3R Size is a standard “dimension” that usually used for a “photography” or other material such as “glossy” photo paper or printing purpose. 3R is a common size that included in R Series. The size can be determined in “unit” of measurements in mm (millimeter) and can be converted into other units as well such as cm (centimeter) or inch (inches).

You can see the illustration of 3R Photo Size for reference as shown in the image and more detailed below. Unlike “A Series paper sizes” based on “ISO” standard, 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 in “R Series”. To get a “value” in cm (centimeter), you can convert the value of mm to cm by divided by 10.

3R Size
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3R89 x 1278.9 x 12.73.5 x 5

“Photo paper” is widely used throughout the world. R Series Photo Print Sizes is “the standard” size commonly used in various countries.

Here is 3R Photo Sizes in units of mm, cm, inch:

  • 3R Photo size in mm is 89 x 127 millimeters.
  • 3R Photo size in cm is 8.9 x 12.7 centimeters.
  • 3R Photo size in inch is 3.5 x 5 inches.

“The R Series Photo Sizes” are 2R, 3R, 4R, 5R, 6R, 8R, 10R, 11R, 12R, 14R, 16R, 20R, 22R, 24R, 30R. It is commonly used for photo types of paper or photography to “print” photo and various other sizes such as “frame”, “postcard”, “passport” photo size. The R sizes is also can be used in some application such as “Photoshop” and “Microsoft Word”. At present there are many types of photo paper that are often used to print photos, for example “glossy photo paper”.

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