Download comes with 2 files. Each file is named with either "3/4 ratio" or "4/5" ratio. The ratio depends on what size you are going to print. Here are the different sizes that go with each ratio:
3:4 ratio for printing:
Inches: 6x8 | 9x12 | 12x16 | 15x20 | 18x24
4:5 ratio for printing:
Inches: 4x5 | 8x10 | 12x15 | 16x20