9 x 7" Picture Photo Mounts + backs & clear bag kit - for 7 x 5" prints. The clear bags are resealable and will accommodate your mount and back - bags are quality high quality 40mn thickness. The 7 x 5” opening is for a 7 x 5” print - we have decreased the actual opening or aperture by 6mm or approx 3mm on all sides - this allows the mount opening to cover the print slightly and allow for hinging or taping.