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 exactly 250mm x

Outer Size exactly 250mm x 200mm

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

All colours are acid-free white-core mountboard

Outer Size to fit an A1 frame - exact outer size 841mm x 594mm

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

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 exactly 250mm xOuter 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.