15 X 15 inch, Mounts, Backs, & Bags, Pack of 10 Aperture size:To fit image size 11 x 11 - exact aperture size 272mm x 272mm The cellophane bags supplied with

The cellophane bags supplied with this size will be 16 x 16 inches

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

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

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

15 X 15 inch, Mounts, Backs, & Bags, Pack of 10 Aperture size:To fit image size 11 x 11 - exact aperture size 272mm x 272mm The cellophane bags supplied withOuter 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