Print sizes starts with A4 (210 x 297 mm = 8.3 x 11.7 in).
The Image is enclosed within a border. So A4 is the full size of the Print and Border.

Other sizes available are:
A0 (841 x 1189 mm = 33.1 x 46.8 in) (Special Order via Contact Form)
A1 (594 x 841 mm = 23.4 x 33.1 in) (Special Order via Contact Form)
A2 (420 x 594 mm = 16.5 x 23.4 in)
A3 (297 x 420 mm = 11.7 x 16.5 in)

As detailed above for the A4 size, all other sizes are similarly styled i.e. Image plus the border, relates to each appropriate size.