The size of 1-inch photo is 2.5cm * 3.5cm. The pixel size of a one inch photo is 295 * 413. A one inch photo refers to a one inch photo, which is generally used as a certificate photo. To ensure that the photo quality is consistent with the size, angle, posture and color of the portrait.
Other photo sizes:
Photo of first generation ID card: 2.2cmx3.2cm; Photo of second generation ID card: 2.6cmx3.2cm; Black and white one inch smaller: 2.2cmx3.2cm; Black and white one inch larger: 3.3cmx4.8cm; Color small one inch blue bottom: 2.7cm x 3.8cm; Color small one inch White Background: 2.7cm x 3.8cm.
Color small one inch red background: 2.7cm x 3.8cm; Color one inch large red background: 4.0cmx5.5cm; One inch smaller: 2.2 × 3.2ｃｍ； One inch larger: 3.3 × 4.8ｃｍ； Small two inch: 3.5 × 4.9ｃｍ； Big two inches: 3.5 × 5.3ｃｍ。