How are photos measured?
In the field of photography and printing, the size of the photo is a very important parameter. Knowing the dimensions of your photo will not only help you choose the right frame, but it will also ensure that there will be no cropping or distortion when printing. This article will provide a detailed introduction to photo size standards, measurement methods, and the uses of common sizes.
1. Photo size standards
Photo dimensions are usually measured in inches or centimeters, and different countries and regions may have different standards. Here are common photo sizes and their corresponding millimeters and inches:
| Size name | mm (width×height) | inches (width x height) |
|---|---|---|
| 1 inch | 25×35 | 1.0×1.4 |
| 2 inches | 35×49 | 1.4×1.9 |
| 5 inches | 89×127 | 3.5×5.0 |
| 6 inches | 102×152 | 4.0×6.0 |
| 7 inches | 127×178 | 5.0×7.0 |
| 8 inches | 152×203 | 6.0×8.0 |
| 10 inches | 203×254 | 8.0×10.0 |
2. How to measure photo size
The dimensions of a photo usually refer to its width and height. When measuring, you need to pay attention to the following points:
1.Use standard tools: It is recommended to use a ruler or tape measure for measurement to ensure the accuracy of the data.
2.Measure the diagonal: In some cases, photo dimensions may be expressed in diagonal length (such as a TV or monitor screen), but photo dimensions are generally based on width and height.
3.Pay attention to the unit: Photo size may be in inches or centimeters, please confirm whether the units match before printing.
3. Uses of common photo sizes
Different sizes of photos are suitable for different scenarios. The following are common uses:
| size | Common uses |
|---|---|
| 1 inch | ID photo, resume photo |
| 2 inches | Passport and visa photos |
| 5 inches | Family albums, commemorative photos |
| 6 inches | Postcards, small photo frames |
| 7 inches | Artistic photos, display photos |
| 8 inches | Posters, medium photo frames |
| 10 inches | Large posters and decorative paintings |
4. How to choose photo size
When choosing a photo size, consider the following factors:
1.use: If it is a ID photo, it must strictly follow the specified size; if it is for decorative purposes, it can be selected according to the photo frame or wall space.
2.resolution: Large photos require higher resolution, otherwise they may appear blurry after printing.
3.Proportion: The aspect ratio of the photo (such as 3:2, 4:3, 16:9) must be consistent with the ratio when shooting, and avoid cropping or white space.
5. Summary
Photo size is an important parameter that cannot be ignored in photography and printing. By understanding standard sizes, how they are measured, and what they are used for, you can better choose the right photo size to ensure optimal printing and presentation. Whether it is a ID photo or an artistic photo, the correct size selection can add a lot of color to the photo.
check the details
check the details
en
