500 x 400 mm, Mounts, Backs, & Bags, Pack of 5 Aperture size:To fit image size A4 - exact aperture size 290mm x 203mm The cellophane bags supplied with

The cellophane bags supplied with this size will be 6 x 4 inches

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

Outer Size to fit an A3 frame - exact outer size 420mm x 297mm

Outer Size exactly 500mm x 500mm

Outer Size to fit a 13 x 13 inch frame - exact outer size 328mm x 328mm

500 x 400 mm, Mounts, Backs, & Bags, Pack of 5 Aperture size:To fit image size A4 - exact aperture size 290mm x 203mm The cellophane bags supplied withOuter Size exactly 500mm x 400mm, 50cm x 40cm 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.