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Photographic Series



Belonging to the ISO 216 series, the 4R paper size is a standard that's recognized globally. This particular size, measuring 102mm x 152mm (or approximately 4 inches x 6 inches), is predominantly used for printing photographs.

The 'R' in its name stands for 'Rectangular' and it's part of a broader range of R sizes designed specifically for photo prints. The dimensions of the 4R paper size are strategically chosen to maintain an aspect ratio that closely mirrors that of most digital cameras, ensuring optimal image quality when printed.

4R paper dimensions


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2A046.81 x 66.221189 x 1682119 x 1683370 x 4768
A120.51 x 0.7113 x 181 x 237 x 51
4A066.22 x 93.621682 x 2378168 x 2384768 x 6741
A110.71 x 1.0218 x 262 x 351 x 74
A101.02 x 1.4626 x 373 x 474 x 105
A3+12.95 x 19.02329 x 48333 x 48933 x 1369
A1+23.98 x 35.98609 x 91461 x 911726 x 2591
A0+35.98 x 50.87914 x 129291 x 1292591 x 3662
A64.13 x 5.83105 x 14811 x 15298 x 420
A55.83 x 8.27148 x 21015 x 21420 x 595
A48.27 x 11.69210 x 29721 x 30595 x 842
A311.69 x 16.54297 x 42030 x 42842 x 1191
A91.46 x 2.0537 x 524 x 5105 x 147
A216.54 x 23.39420 x 59442 x 591191 x 1684
A82.05 x 2.9152 x 745 x 7147 x 210
A123.39 x 33.11594 x 84159 x 841684 x 2384
A72.91 x 4.1374 x 1057 x 11210 x 298
A033.11 x 46.81841 x 118984 x 1192384 x 3370

Interestingly, despite being part of the ISO series, the use of R sizes like the 4R is more prevalent in countries such as Japan and South Korea. In contrast, many Western countries lean towards using A sizes from either ISO or ANSI series for their photographic prints.

One key advantage offered by this specific paper size is its cost-effectiveness. Given its smaller dimensions compared to larger A-series counterparts, printing on a 4R paper can be significantly more economical without compromising on image quality. This makes it an ideal choice for both professional photographers and casual users alike who seek high-quality prints at an affordable price point.

Whether you're looking to print your cherished memories or professional photographs, understanding and utilizing the right paper size like the versatile and cost-effective 4R can make all the difference in achieving optimal print results.

Other Formats in the Photographic Series

Interesting facts about 4R

1. The Origin of 4R Paper

4R paper is a popular photo paper size commonly used for printing photographs. The "4R" designation comes from the traditional size of the print, which is approximately 4 inches by 6 inches (10 cm by 15 cm). It is derived from the historical C series paper sizes.

2. International Standardization

The 4R paper size is not an internationally standardized size like A-series papers. It originated in Japan and gained popularity in Southeast Asia, particularly in countries like Malaysia, Singapore, and the Philippines.

3. Metric Conversion

The metric equivalent of 4R paper is approximately 102 mm by 152 mm. This conversion helps to maintain consistency when printing or resizing images across different regions that use metric measurements.

4. Common Usage

Due to its convenient size, 4R paper is widely used for personal photo prints, postcards, and greeting cards. It provides a compact format that can be easily shared or displayed without taking up too much space.

5. Aspect Ratio

The aspect ratio of a standard 6-inch length divided by a standard 4-inch width results in a ratio of 3:2 for the dimensions of a typical photograph printed on 4R paper.


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