What is the electronic size of a 1-inch photo?

The commonly used 1-inch photo size is 2.5*3.5cm.

However, the number of pixels depends on the purpose. If it is developed, the resolution is generally 300dpi, which is 295*412. If it is uploaded online, the resolution is generally 72dpi, which is 71*99. .

Extended information:

Other special photos:

First-generation ID card photo: (black and white headshot): 2.2cm x 3.2cm

Second-generation ID card photo: 2.6cm x 3.2cm

Black and white, small one inch: 2.2cm x 3.2cm

Black and white, large one inch: 3.3cm x 4.8cm

Colored small one-inch blue background: 2.7cm x 3.8cm

Colored small one-inch white background: 2.7cm x 3.8cm

Colored small one-inch red background: 2.7cm x 3.8cm

Colored one-inch large red base: 4.0cm x 5.5cm

(1 inch/2 inch) 150-200KB 640x480 (300,000) 2.5×3.5cm/3.5x5.3cm?

Baidu Encyclopedia-One-Inch Photo