15 X 15 inch, Mounts, Backs, & Bags, Pack of 5 20x16 Outer Size to fit a

Outer Size to fit a 15 x 15 inch frame - exact outer size 378mm x 378mm

The cellophane bags supplied with this size will be 14 x 11 inches

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

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

All colours are acid-free white-core mountboard

15 X 15 inch, Mounts, Backs, & Bags, Pack of 5 20x16 Outer Size to fit aOuter Size to fit a 15 x 15 inch frame exact outer size 378mm x 378mm The cellophane bags supplied with this size will be 16 x 16 inches. This means that the 1 inch excess in width will need to be folded to the back of the mount and held in place using clear self adhesive tape. Then the excess length can folded down and sealed with the self adhesive flap in the normal way. Choice of aperture size Scroll through the pictures to find the size that best