Choose your poster size, for example 50x70 cm.
Choose the passepartout with a window in the same size as your poster, for example "70x100 cm (window 50x70 cm)".
Choose the frame in the outer size of the passepartout, for example 70x100 cm.
Examples:
Your poster | Passepartout | Frame |
21x30 cm | 30x40 cm (window 21x30 cm) | 30x40 cm |
30x40 cm | 40x50 cm (window 30x40 cm) | 40x50 cm |
50x70 cm | 70x100 cm (window 50x70 cm) | 70x100 cm |
Because a passepartout needs a bigger frame than the poster, a poster with a passepartout always goes in a frame one size up. Without a passepartout, the frame has the same size as the poster. For example, a 50x70 cm poster fits a 50x70 cm frame.
Good to know
Poster sizes always refer to the size of the paper.
The size of a frame is the size of the print it fits.
If a size is not available for the frame or passepartout you want, that combination is not sold.