Supersafe one pocket pages are designed to display and protect mint sheets. The pocket measures approximately 9-5/8" x 11-3/8". The entire page measures 10-3/4" x 11-1/2" and fits in Supersafe MA1, MF1, MF2, 10CV, 10CH Albums, or MB2 or KSB binders. Pockets open from the top and outside edge with one pockets per side (two total).Supersafe pages consist of 3-layers which sandwich a sheet of richly textured jet black archival PolyPro film between 2 layers of crystal clear PolyPro film. No noxious PVC or acetate, no dyed black paper insert will ever touch your valuable sheets.