{"id":1841,"date":"2026-10-08T15:13:00","date_gmt":"2026-10-08T19:13:00","guid":{"rendered":"https:\/\/www.xconvert.com\/blog\/?p=1841"},"modified":"2026-08-31T23:05:36","modified_gmt":"2026-09-01T03:05:36","slug":"jpg-to-pdf-a4-vs-letter-page-size","status":"publish","type":"post","link":"https:\/\/www.xconvert.com\/blog\/jpg-to-pdf-a4-vs-letter-page-size","title":{"rendered":"A4 or US Letter: Picking the Right Page Size for Photo PDFs"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">You dropped twenty holiday photos into an image-to-PDF tool, opened the result, and every page is a small picture floating in a sea of white. Or you sent a perfectly composed PDF to a colleague in Chicago and it printed 6% smaller with a stripe along the bottom. Both are the same problem: <strong>the page size you were given doesn\u2019t match the shape of what you put on it.<\/strong> A4 and US Letter are not just different sizes \u2014 they are different <em>proportions<\/em>, and a photo doesn\u2019t care about millimetres, only about ratios.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p><strong>Quick answer:<\/strong> If the PDF will be <strong>printed in the US, Canada or Mexico<\/strong>, choose <strong>LETTER<\/strong>. Printed anywhere else, choose <strong>A4<\/strong> \u2014 it\u2019s the default. If nobody will print it (an upload, an e-signature, a portfolio, a phone), choose <strong>Original<\/strong> and the page becomes the image\u2019s own size, with no white space at all. Then set <strong>Page layout<\/strong> to match your photos: a landscape photo on a portrait page covers <strong>under half of it<\/strong>, whichever paper size you picked. Every control named here is on <a href=\"https:\/\/www.xconvert.com\/merge-image-to-pdf\">xconvert.com\/merge-image-to-pdf<\/a>.<\/p><\/blockquote>\n\n\n\n<h2 class=\"wp-block-heading\">Jump to a section<\/h2>\n\n\n\n<ul class=\"wp-block-list\"><li><a href=\"#shapes\">A4 and Letter are different shapes<\/a><\/li><li><a href=\"#coverage\">How much of the page your photo covers<\/a><\/li><li><a href=\"#all-sizes\">All thirteen page sizes and when each is right<\/a><\/li><li><a href=\"#other-controls\">Margin, placement and alignment change the answer<\/a><\/li><li><a href=\"#tool\">Set the page size on xconvert<\/a><\/li><li><a href=\"#faq\">FAQ<\/a><\/li><\/ul>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"shapes\">A4 and Letter are different shapes<\/h2>\n\n\n\n<figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1600\" height=\"971\" src=\"https:\/\/www.xconvert.com\/blog\/wp-content\/uploads\/2026\/08\/page-size-decision.png\" alt=\"Decision chain for choosing a PDF page size: Original when nobody prints it, LETTER for North America, A4 elsewhere, then match the page layout to the photos\" class=\"wp-image-1839\" srcset=\"https:\/\/www.xconvert.com\/blog\/wp-content\/uploads\/2026\/08\/page-size-decision.png 1600w, https:\/\/www.xconvert.com\/blog\/wp-content\/uploads\/2026\/08\/page-size-decision-300x182.png 300w, https:\/\/www.xconvert.com\/blog\/wp-content\/uploads\/2026\/08\/page-size-decision-1024x621.png 1024w, https:\/\/www.xconvert.com\/blog\/wp-content\/uploads\/2026\/08\/page-size-decision-768x466.png 768w, https:\/\/www.xconvert.com\/blog\/wp-content\/uploads\/2026\/08\/page-size-decision-1536x932.png 1536w\" sizes=\"auto, (max-width: 1600px) 100vw, 1600px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A4<\/strong> is 210 mm \u00d7 297 mm \u2014 the ISO A series, used essentially everywhere outside North America. <strong>US Letter<\/strong> is 8.5 in \u00d7 11 in. Since <a href=\"https:\/\/www.nist.gov\/pml\/owm\/si-units-length\">an inch is exactly 25.4 mm<\/a>, that\u2019s 215.9 mm \u00d7 279.4 mm. So Letter is <strong>6 mm wider and 18 mm shorter<\/strong> than A4.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The proportions matter more than the millimetres:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th><\/th><th>A4<\/th><th>US Letter<\/th><\/tr><\/thead><tbody><tr><td>Size<\/td><td>210 \u00d7 297 mm<\/td><td>215.9 \u00d7 279.4 mm (8.5 \u00d7 11 in)<\/td><\/tr><tr><td>Height \u00f7 width<\/td><td><strong>1.414<\/strong><\/td><td><strong>1.294<\/strong><\/td><\/tr><tr><td>Standard<\/td><td>ISO 216 A series<\/td><td>ANSI A \/ North American<\/td><\/tr><tr><td>Used in<\/td><td>Everywhere except North America<\/td><td>US, Canada, Mexico<\/td><\/tr><tr><td>Halves into<\/td><td>Two A5 sheets of the same proportion<\/td><td>Two sheets of a <em>different<\/em> proportion<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">A4\u2019s ratio is the square root of two, which is why folding an A-series sheet in half gives you the next size down with identical proportions. Letter has no such property \u2014 halve it and you get a 5.5 \u00d7 8.5 sheet with a different shape.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>What happens when the wrong one gets printed.<\/strong> Printers scale to fit rather than clipping, so nothing is lost, but the result is off-centre and slightly small:<\/p>\n\n\n\n<ul class=\"wp-block-list\"><li>An <strong>A4 PDF printed on Letter paper<\/strong> scales to about <strong>94%<\/strong> \u2014 the page is limited by A4\u2019s greater height (279.4 \u00f7 297).<\/li><li>A <strong>Letter PDF printed on A4<\/strong> scales to about <strong>97%<\/strong>, limited by A4\u2019s narrower width (210 \u00f7 215.9).<\/li><\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">For photos that\u2019s harmless. For anything where physical size matters \u2014 a signed form, a scale drawing, a document with a printed measurement on it \u2014 pick the paper the recipient actually owns.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"coverage\">How much of the page your photo covers<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">This is the part nobody tells you, and it\u2019s the real reason photo PDFs look wrong. With the default <strong>Contained<\/strong> placement, the whole image is fitted inside the printable area without cropping \u2014 so a mismatch in shape becomes white space.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The table below is the fraction of the printable area a single photo covers, with the default <strong>Narrow (0.5&quot;)<\/strong> margin. It\u2019s pure geometry: the photo is scaled until it touches the shorter constraint, and the rest is white.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>Photo shape<\/th><th>A4 portrait<\/th><th>A4 landscape<\/th><th>Letter portrait<\/th><th>Letter landscape<\/th><\/tr><\/thead><tbody><tr><td><strong>3:2 landscape<\/strong> (most cameras)<\/td><td>45%<\/td><td><strong>98%<\/strong><\/td><td>50%<\/td><td>89%<\/td><\/tr><tr><td><strong>4:3 landscape<\/strong> (many phones, iPad)<\/td><td>51%<\/td><td>91%<\/td><td>56%<\/td><td><strong>100%<\/strong><\/td><\/tr><tr><td><strong>16:9 landscape<\/strong> (screenshots, video stills)<\/td><td>38%<\/td><td>83%<\/td><td>42%<\/td><td>75%<\/td><\/tr><tr><td><strong>3:2 portrait<\/strong> (upright photo)<\/td><td><strong>98%<\/strong><\/td><td>45%<\/td><td>89%<\/td><td>50%<\/td><\/tr><tr><td><strong>1:1 square<\/strong> (Instagram)<\/td><td>68%<\/td><td>68%<\/td><td>75%<\/td><td>75%<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Three things fall out of it:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Orientation beats paper size, by a mile.<\/strong> Getting Landscape versus Portrait right moves you from 45% to 98%. Choosing A4 versus Letter moves you a handful of percent. If your photos are landscape, set <strong>Page layout<\/strong> to <strong>Landscape<\/strong> and stop worrying about the rest.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Two combinations are effectively perfect.<\/strong> A4 in landscape with a 0.5&quot; margin leaves a printable box of 10.69 \u00d7 7.27 in \u2014 a ratio of 1.470, within 2% of the 1.5 that a 3:2 camera photo wants. And Letter in landscape leaves exactly <strong>10 \u00d7 7.5 in<\/strong>, which is exactly 4:3 \u2014 a 4:3 phone photo fills it edge to edge with no white space at all. Neither is a coincidence you\u2019ll find documented anywhere; it just falls out of subtracting an inch from each dimension.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Margins change the shape of the box, not just its size.<\/strong> Letter is 1.294 bare, but 1.333 after a 0.5&quot; margin. That\u2019s why the margin setting can matter as much as the paper.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"all-sizes\">All thirteen page sizes and when each is right<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The <strong>Paper size<\/strong> dropdown has thirteen entries. Most guides pretend there are two.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>Option<\/th><th>Size<\/th><th>Ratio<\/th><th>Use it when<\/th><\/tr><\/thead><tbody><tr><td><strong>Original<\/strong><\/td><td>The image\u2019s own dimensions<\/td><td>Matches the photo<\/td><td>Nobody will print it \u2014 uploads, e-signing, portfolios, phone viewing. Zero white space by construction<\/td><\/tr><tr><td><strong>A4<\/strong> <em>(default)<\/em><\/td><td>8.27 \u00d7 11.69 in (210 \u00d7 297 mm)<\/td><td>1.414<\/td><td>Printing anywhere outside North America<\/td><\/tr><tr><td><strong>LETTER<\/strong><\/td><td>8.5 \u00d7 11 in<\/td><td>1.294<\/td><td>Printing in the US, Canada or Mexico<\/td><\/tr><tr><td><strong>LEGAL<\/strong><\/td><td>8.5 \u00d7 14 in<\/td><td>1.647<\/td><td>US legal filings and long forms<\/td><\/tr><tr><td><strong>EXECUTIVE<\/strong><\/td><td>7.25 \u00d7 10.5 in<\/td><td>1.448<\/td><td>Smaller US business documents<\/td><\/tr><tr><td><strong>A3<\/strong><\/td><td>11.69 \u00d7 16.53 in (297 \u00d7 420 mm)<\/td><td>1.414<\/td><td>Posters, plans, two A4 pages side by side<\/td><\/tr><tr><td><strong>TABLOID<\/strong><\/td><td>11 \u00d7 17 in<\/td><td>1.545<\/td><td>US large-format portrait \u2014 newsletters, spreads<\/td><\/tr><tr><td><strong>LEDGER<\/strong><\/td><td>17 \u00d7 11 in<\/td><td>0.647<\/td><td>The same sheet in landscape, already rotated<\/td><\/tr><tr><td><strong>ARCH_A<\/strong><\/td><td>9 \u00d7 12 in<\/td><td>1.333<\/td><td>Architectural small sheet \u2014 and <strong>exactly 4:3<\/strong>, so a 4:3 photo fills it with no margin at all<\/td><\/tr><tr><td><strong>ARCH_B<\/strong><\/td><td>12 \u00d7 18 in<\/td><td>1.5<\/td><td>Architectural \u2014 and <strong>exactly 3:2<\/strong>, the native shape of most camera photos<\/td><\/tr><tr><td><strong>ISO_B5<\/strong><\/td><td>6.93 \u00d7 9.85 in (176 \u00d7 250 mm)<\/td><td>1.421<\/td><td>Books and booklets<\/td><\/tr><tr><td><strong>ISO_B4<\/strong><\/td><td>9.85 \u00d7 13.9 in (250 \u00d7 353 mm)<\/td><td>1.411<\/td><td>Larger booklets, envelopes<\/td><\/tr><tr><td><strong>SCREEN_SIZE<\/strong><\/td><td>6.5 \u00d7 5.18 in<\/td><td>0.797<\/td><td>A small landscape page; matches no print standard<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">The two ARCH entries are the quiet win. They exist for architectural drawings, but 9 \u00d7 12 is exactly 4:3 and 12 \u00d7 18 is exactly 3:2 \u2014 so if you\u2019re producing a photo book or a print-shop file rather than an office document, they letterbox nothing.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"other-controls\">Margin, placement and alignment change the answer<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Three more controls decide what the page looks like, and their defaults are worth knowing.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Margin<\/strong> \u2014 default <strong>Narrow (0.5&quot;)<\/strong>, with <strong>No margin (0&quot;)<\/strong>, <strong>Moderate (0.75&#215;1&quot;)<\/strong>, <strong>Normal (1&quot;)<\/strong> and <strong>Large (2&#215;1&quot;)<\/strong> alongside it. Set it to <strong>No margin<\/strong> with <strong>Original<\/strong> page size and you get a PDF that is exactly your images, edge to edge \u2014 the right answer for a photo book or a screenshot PDF that will only ever be viewed. Note that the margins are quoted in inches even when the paper is A4.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Image placement<\/strong> \u2014 default <strong>Contained<\/strong>, which fits the entire image inside the printable area and accepts the white space. The alternative, <strong>Cover<\/strong>, scales the image until it fills the page and <strong>crops whatever overflows<\/strong>. Cover gives you an edge-to-edge page every time, at the cost of losing the edges of the picture. For a full-bleed photo page it\u2019s what you want; for a document scan or a receipt it will eat content, so leave it on Contained.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Image alignment<\/strong> \u2014 default <strong>Center<\/strong>, with <strong>Top<\/strong> and <strong>Bottom<\/strong>. This only does anything when there <em>is<\/em> white space, i.e. under Contained. Top alignment reads better for scanned documents; Center is right for photos.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Two related controls round it out: <strong>Combine?<\/strong> defaults to <strong>Single PDF<\/strong> (switch to <strong>Individual PDFs<\/strong> for one file per image), and <strong>Image Transparency<\/strong> defaults to <strong>Unchanged<\/strong>, which flattens transparent areas onto white \u2014 the right answer for a document page. <strong>Removed<\/strong> takes the other route and keeps the alpha channel in the PDF. If page order is your problem rather than page size, <a href=\"https:\/\/www.xconvert.com\/blog\/merge-images-into-one-pdf-in-order\/\">merge images into one PDF in the right order<\/a> covers that.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"tool\">Set the page size on xconvert<\/h2>\n\n\n\n<ol class=\"wp-block-list\"><li>Open <a href=\"https:\/\/www.xconvert.com\/merge-image-to-pdf\">xconvert.com\/merge-image-to-pdf<\/a> and click <strong>Upload<\/strong>. It accepts JPG, PNG, HEIC, TIFF, WebP and camera raw files, among others.<\/li><li>Open <strong>Advanced Options<\/strong> and find <strong>Paper size<\/strong>. The <strong>Page size<\/strong> dropdown opens on <strong>A4<\/strong> \u2014 change it to <strong>LETTER<\/strong> for North American printing, or <strong>Original<\/strong> if the PDF will only ever be viewed on a screen.<\/li><li>Set <strong>Page layout<\/strong> to <strong>Landscape<\/strong> if your photos are landscape. This is the single biggest change you can make to how the result looks.<\/li><li>Adjust <strong>Margin<\/strong> (default <strong>Narrow (0.5&quot;)<\/strong>) and <strong>Image placement<\/strong> \u2014 <strong>Contained<\/strong> keeps the whole image and leaves white space, <strong>Cover<\/strong> fills the page and crops the overflow.<\/li><li>Leave <strong>Combine?<\/strong> on <strong>Single PDF<\/strong> for one document, and click <strong>Merge<\/strong>.<\/li><\/ol>\n\n\n\n<p class=\"wp-block-paragraph\">Your files upload over an encrypted connection, are processed on our servers, and are <strong>deleted automatically a few hours later<\/strong> \u2014 nothing stays around. If you\u2019re working from a phone, <a href=\"https:\/\/www.xconvert.com\/blog\/combine-photos-into-one-pdf-iphone-android-pc\/\">combining photos into one PDF on iPhone and Android<\/a> covers the device-side routes.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\" id=\"faq\">FAQ<\/h2>\n\n\n\n<h5 class=\"wp-block-heading\">Should I use A4 or Letter for a PDF of photos?<\/h5>\n\n\n\n<p class=\"wp-block-paragraph\">If it will be printed, use the paper the printer actually holds: <strong>Letter<\/strong> in the US, Canada and Mexico, <strong>A4<\/strong> everywhere else. If it will only be viewed on a screen \u2014 an upload, an attachment, an e-signature \u2014 neither is ideal, and <strong>Original<\/strong> is better because the page takes the image\u2019s own dimensions and there is no white space to argue about.<\/p>\n\n\n\n<h5 class=\"wp-block-heading\">Why are there big white borders around my photos in the PDF?<\/h5>\n\n\n\n<p class=\"wp-block-paragraph\">Because the photo\u2019s shape doesn\u2019t match the page\u2019s shape, and the default <strong>Contained<\/strong> placement fits the whole image inside rather than cropping it. A landscape photo on a portrait A4 page covers about 45% of the printable area \u2014 the other 55% is white. Switch <strong>Page layout<\/strong> to <strong>Landscape<\/strong>, or switch <strong>Image placement<\/strong> to <strong>Cover<\/strong> if you\u2019re willing to lose the edges of the picture.<\/p>\n\n\n\n<h5 class=\"wp-block-heading\">What size is A4 in inches?<\/h5>\n\n\n\n<p class=\"wp-block-paragraph\">210 \u00d7 297 mm is <strong>8.27 \u00d7 11.69 inches<\/strong>, using the exact definition of an inch as 25.4 mm. Those are the numbers the page-size list uses. US Letter, for comparison, is 8.5 \u00d7 11 in \u2014 wider and shorter.<\/p>\n\n\n\n<h5 class=\"wp-block-heading\">What happens if I print an A4 PDF on Letter paper?<\/h5>\n\n\n\n<p class=\"wp-block-paragraph\">It scales to about <strong>94%<\/strong> and sits off-centre, because A4 is taller than Letter, so the height is the limiting dimension. Nothing is cut off \u2014 printers fit to the page rather than clipping \u2014 but anything printed at a specific physical size will be wrong. Going the other way, a Letter PDF on A4 scales to about 97%.<\/p>\n\n\n\n<h5 class=\"wp-block-heading\">Which page size gives no white space at all?<\/h5>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Original<\/strong>, for any image, because the page is made to match the image. If you need a real paper size, match the ratio instead: <strong>ARCH_B<\/strong> (12 \u00d7 18 in) is exactly 3:2, the native shape of most camera photos, and <strong>ARCH_A<\/strong> (9 \u00d7 12 in) is exactly 4:3. With a 0.5&quot; margin, <strong>Letter in landscape<\/strong> leaves a printable box of exactly 10 \u00d7 7.5 in, which is 4:3 \u2014 a 4:3 phone photo fills it precisely.<\/p>\n\n\n\n<h5 class=\"wp-block-heading\">Does the page size affect the PDF\u2019s file size?<\/h5>\n\n\n\n<p class=\"wp-block-paragraph\">Barely. Page size is stored as page geometry, a handful of bytes; the file size comes from the images themselves and from the <strong>Image Compression<\/strong> <em>Quality Percentage<\/em> setting. Choosing A3 instead of A4 does not double the file. If size is your constraint, that quality slider is the control to move.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Sources<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><em>Last verified 2026-08-31.<\/em><\/p>\n\n\n\n<ul class=\"wp-block-list\"><li><a href=\"https:\/\/www.w3.org\/TR\/css-page-3\/\">W3C \u2014 CSS Paged Media Module Level 3<\/a> \u2014 standardised page-size dimensions: A4 \u201c210 mm wide and 297 mm high\u201d, A3 \u201c297mm wide and 420mm high\u201d, B5 \u201c176mm wide by 250mm high\u201d, B4 \u201c250mm wide by 353mm high\u201d, letter \u201c8.5 inches wide and 11 inches high\u201d, legal \u201c8.5 inches wide by 14 inches high\u201d, ledger \u201c11 inches wide by 17 inches high\u201d.<\/li><li><a href=\"https:\/\/www.nist.gov\/pml\/owm\/si-units-length\">NIST \u2014 SI units: length<\/a> \u2014 \u201cThe value for the inch, derived from the value of the Yard effective July 1, 1959, is exactly equivalent to 25.4 mm\u201d, the basis for every mm-to-inch figure above.<\/li><li><a href=\"https:\/\/www.xconvert.com\/merge-image-to-pdf\">xconvert image-to-PDF merger<\/a> \u2014 live tool; verified the controls and defaults named above: <strong>Combine?<\/strong> (default <em>Single PDF<\/em>), <strong>Margin<\/strong> (default <em>Narrow (0.5&quot;)<\/em>), <strong>Paper size \u2192 Page size<\/strong> (13 entries, default <em>A4<\/em>), <strong>Page layout<\/strong> (default <em>Portrait<\/em>), <strong>Image placement<\/strong> (default <em>Contained<\/em>), <strong>Image alignment<\/strong> (default <em>Center<\/em>), <strong>Image Compression<\/strong> (<em>Quality Percentage<\/em> slider), <strong>Image Transparency<\/strong> (default <em>Unchanged<\/em>).<\/li><li><strong>xconvert implementation values<\/strong> \u2014 the page-size presets in inches: Letter 8.5 \u00d7 11, Tabloid 11 \u00d7 17, Ledger 17 \u00d7 11, Legal 8.5 \u00d7 14, Executive 7.25 \u00d7 10.5, A3 11.69 \u00d7 16.53, A4 8.27 \u00d7 11.69, Screen 6.5 \u00d7 5.18, Arch A 9 \u00d7 12, Arch B 12 \u00d7 18, ISO B5 6.93 \u00d7 9.85, ISO B4 9.85 \u00d7 13.9, and Original = the image\u2019s own dimensions. Coverage percentages are computed from these figures minus the default 0.5&quot; margin.<\/li><\/ul>\n","protected":false},"excerpt":{"rendered":"<p>A4 or US Letter for a photo PDF? The shapes differ, not just the sizes. What each page size covers, all 13 options, and when Original beats both.<\/p>\n","protected":false},"author":4,"featured_media":1838,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5,14],"tags":[],"class_list":["post-1841","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-how-to-guides","category-tools"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>A4 or US Letter: Picking the Right Page Size for Photo PDFs<\/title>\n<meta name=\"description\" content=\"A4 or US Letter for a photo PDF? The shapes differ, not just the sizes. 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