Page protector by Project Life in design A. This design has four 6x4 size pockets and four 3x4 size pockets. These page protectors will fit most 12x12 size albums, ring bound and post bound. If you're adding more pages to a postbound album you'll need post extenders, most albums will come supplied with them but they are also sold seperately too. Please note this is for one page protector so order as many as you require.