film. Called "20 × 25 cm" worldwide. S8R 6PW 8" × 12" 203 × 305 mm 2398 × 3602 px 3:2 (1.5) Closest approximation to A4 , twice the size of a 6R print. Called "20 × 30 cm" worldwide. 10R 4P 10" × 12" 254 × 305 mm 3000 ×