Metric Size Conversion Chart
| Size (imperial) | Size (metric) |
| 8 x 10 inches | 20 x 25 cm |
| 11 x 14 inches | 28 x 36 cm |
| 12 x 16 inches | 30 x 40 cm |
| 16 x 20 inches | 40 x 50 cm |
| 18 x 24 inches | 45 x 60 cm |
| 20 x 28 inches | 50 x 70 cm |
| 24 x 36 inches | 60 x 90 cm |
| 30 x 40 inches | 75 x 100 cm |
| Square 12 x 12 inches | 30 x 30 cm |
| Square 16 x 16 inches | 40 x 40 cm |
| Square 20 x 20 inches | 50 x 50 cm |
| Square 24 x 24 inches | 60 x 60 cm |
| Square 30 x 30 inches | 75 x 75 cm |