Pioneer Photo Albums Refill Pages for Wf5781 Wedding Photo Album (Holds 20 5x7 Photos) 5 sheets per pack, Acid free, archival, photo safe Optically clear pockets hold 20 photos up to 5x7 Side-loading from center of book, 3 holes spaced 4-1/4" apart Shaded paper page background with memo area Includes extension posts for the WF-5781 photo album