Sizes

We're based in the UK but use different printers in different regions - UK, Europe and the US/World - so sizes vary slightly: 

US + WORLD

Small: 9 x 11 inches (22.86 x 27.94cm or 228.6mm x 279.4mm)

Medium: 12 x 18 inches (30.48 x 45.72 cm or 304.8mm x 457.2mm)

Large: 24 x 36 inches (60.96cm x 91.44cm or 609.6 x 812.8 mm)

EU 

Small: 8.3 x 11.7 inches (21 x 29.7 cm or 210 x 297 mm)

Medium: 11.7 x 16.5 inches (29.7 x 42 cm or 297 x 420 mm)

Large: 23.4 x 33.1 inches (59.4 x 84.1 cm or  594 x 841 mm)

UK

Small: 8.3 x 11.7 inches (21 x 29.7 cm or 210 x 297 mm)

Medium: 11.7 x 16.5 inches (29.7 x 42 cm or 297 x 420 mm)

Large: 24 x 36 inches (60.96cm x 91.44cm or 609.6 x 812.8 mm)