16 X 16 inch, Mounts, Backs, & Bags, Pack of 10 Aperture size:To fit image size 8 x 8 - exact aperture size 196mm x 196mm Then the excess length can

Then the excess length can folded down and sealed with the self-adhesive flap in the normal way

then select it from the dropdown menu

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

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

16 X 16 inch, Mounts, Backs, & Bags, Pack of 10 Aperture size:To fit image size 8 x 8 - exact aperture size 196mm x 196mm Then the excess length canOuter Size to fit a 16 x 16 inch frame exact outer size 404mm x 404mm 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.