A1, 841 x 594 mm, Mounts, Backs, & Bags, Pack of 5 Aperture size:Equal borders of 65mm - exact aperture size 711mm x 464mm Outer Size to fit a

Outer Size to fit a 11 x 9 inch frame - exact outer size 277mm x 226mm

Outer Size to fit a 14 x 11 inch frame - exact outer size 353mm x 277mm

Outer Size to fit a 11 x 11 inch frame - exact outer size 277mm x 277mm

This means that the 2 inch excess will need to be folded down at the back of the mount

Outer Size to fit a 20 x 16 inch frame - exact outer size 505mm x 404mm

A1, 841 x 594 mm, Mounts, Backs, & Bags, Pack of 5 Aperture size:Equal borders of 65mm - exact aperture size 711mm x 464mm Outer Size to fit aOuter Size to fit an A1 frame exact outer size 841mm x 594mm. Choice of aperture size Scroll through the pictures to find the size that best fits your artwork, then select it from the dropdown menu. Choice of colour On screen colours may not be true to life. Order colour samples here. Select your preferred colour from the dropdown menu. All colours are acid free white core mountboard, 1. 4mm thick.