A3, 420 x 297 mm, Mounts & Backs, Pack of 10 14x14 Outer Size exactly 180mm x

Outer Size exactly 180mm x 130mm

Then the excess length can folded down and sealed with the self-adhesive flap in the normal way

Outer Size to fit a 16 x 12 inch frame - exact outer size 404mm x 302mm

32cm x 32cm

A3, 420 x 297 mm, Mounts & Backs, Pack of 10 14x14 Outer Size exactly 180mm xOuter Size to fit an A3 frame exact outer size 420mm x 297mm 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.