(a) 20.5 × 11.5 cm irreg. (image and sheet) (b) 20.2 × 14.3 cm irreg. (image and sheet) (c) 20.0 × 11.3 cm irreg. (image and sheet) (d) 18.6 × 10.1 cm irreg. (image and sheet) (e) 19.0 × 12.3 cm irreg. (image and sheet) (f) 20.3 × 13.5 cm irreg. (image and sheet) (g) 20.0 × 9.5 cm irreg. (image and sheet) (i) 19.0 × 12.0 cm irreg. (image and sheet) (j) 19.5 × 12.2 cm irreg. (image and sheet) (k) 23.0 × 16.4 cm (closed) 26.8 × 38.1 cm (open) (envelope)