Conversion Table

Inches   Centimeters
5x7 13 x 18 cm 
8x10 20 x 25 cm
8x12 21 x 30 cm
12x16 30 x 40 cm
16x20 40 x 50 cm
16x24 40 x 60 cm 
20x28 50 x 70 cm
24x32 60 x 80 cm
24x36 60 x 90 cm