300 x 210 mm, Mounts, Backs, & Bags, Pack of 5 Aperture size:Equal borders of 30mm - exact aperture size 240mm x 150mm This means that the 3

This means that the 3 inch excess will need to be folded down at the back of the mount

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

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

Outer Size to fit a 7 x 7 inch frame - exact outer size 175mm x 175mm

Outer Size exactly 180mm x 130mm

300 x 210 mm, Mounts, Backs, & Bags, Pack of 5 Aperture size:Equal borders of 30mm - exact aperture size 240mm x 150mm This means that the 3Outer Size exactly 300mm x 210mm, 30cm x 21cm 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.