Hi Andrea, Here are a few more sizes including 20×24. Note that these proportions (and those previously mentioned) only work on collage layouts that are initially square in shape:
| Dimensions | Collage Ratio |
| 4.25×5.5″ | 44:56 or 56:44 |
| 8×5″ | 38:62 or 62:38 |
| 8.5×5.5″ | 39:61 or 61:39 |
| 8.5×11″ | 44:56 or 56:44 |
| 20×24″ | 45:55 or 55:45 |
