How to open your eyes when taking a photo one inch larger?

First of all, the so-called several-inch photos all refer to the long-side inch value of the photos. Usually, the actual long side of 1 inch is 1.5 inch, which can also be called a large 1 inch photo. (1 inch = 2.54cm)

The following information comes from the Notice on Printing and Distributing the Service Specification of Beijing Photography Industry (for Trial Implementation).

(Shang Jing Jiao Zi [2005] No.24)

2.5cm× 3.5cm.

1 inch

3.5 cm ×4.9 cm

2 inches

5 cm ×7.2 cm

3 inches

7.2 cm ×9.9 cm

4 inches

8.5cm×12.5cm.

5 inches

10cm×15cm

6 inches

12.6cm×17.5cm.

7 inches

15cm× 20cm

8 inches

19.2cm× 24.4cm

10 inch

23.5cm× 28.5cm.

12 inch

26 cm ×35 cm

14 inch

27.6 cm ×38.5 cm

16 inch

32 cm ×45 cm

18 inch

35cm× 50cm

20 inches

50 cm ×60 cm

24 inches

55cm× 75cm

30 inches

70cm× 90cm

36 inches

90cm× 120cm

48 inches

120cm×150cm

60 inches