Standardphotographic print sizes are used inphotographic printing. Cut sheets of paper meant for printing photographs are commonly sold in these sizes.

Many nominal and effective sizes are specified in international standardISO 1008 using millimeters only, although most are clearly derived from integer-inch lengths. They are highlighted in the table below.

In the US, size names are often denoted with a code of the formatnR, where the numbern represents the length of the shorter edge in inches. In the normal series, the long edge is the length of the short edge plus 2 inches (10 in or less) or 3 inches (11 in and above). The alternativeSuper series, denotedSnR,nR Plus ornR+, has anaspect ratio of 3∶2 (or as close as possible) and thus provides a better fit for standard135 film (35 mm) at sizes of 8 inches or above.5R is twice the size of a 2R print, 6R twice the size of a 4R print and S8R twice the size of 6R.4D/6D is a newer size for most consumer leveldigital cameras andMicro 4/3 cameras^[1]American S8R or Japanese 6PW at203 mm × 305 mm is the closest 3∶2 approximation toA4 at210 mm × 297 mm (√2∶1).

The sizes with 7 ×9+1⁄2,12 × 16 (4∶3) and9+1⁄2 × 12 inches (5∶4) are used for black-and-white paper.

In Japan, the same print sizes (and several additional ones) are known by different designations. The JapaneseL is equivalent to 3R, while2L—twice the size—matches 5R.KG represents the size of a traditional4 × 6 in (4R) Japanese postcard (hagaki).^[2]

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ThenP or cut (切り,kiri) series are defined in reference to a full page size (全紙,zenshi) of457 × 560 mm, with smaller numbers (fewer cuts) indicatinglarger sizes.^[3] AW suffix indicates sizes with an extended long edge, similar to the AmericanS prefix.JapaneseChou sizes are for envelopes andHagaki for postcards. They do not match exactly the related sizes from ISO 216, like A6 for international standard postcards.

UnlikeISO 216 paper sizes, the aspect ratios of photographic prints vary, so exact scaling of prints is not always possible. However, there are some logical correspondences between the sizes, noted below where applicable.

Many of the standard sizes are the same assheet filmformats, and are appropriate for making contact sheets from these films.

• Film format § Still photography film formats
• International standard paper sizes
• Paper size § Photography sizes
• Standard ad size

• Photographic processes
• Media formats

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