Bulk Pack Pioneer STR 4x6 Photo Album Refill for ST-400 - 100 Pages (50 Sheets) Optically clear side-loading pockets White paper page background with memo area 3 holes spaced 2-1/2" apart, Page Dimensions: 10-1/2" x 6-3/4" including memo width of 1-3/4" Acid free, archival, photo safe 100 Pages (50 Sheets), Bulk Packaging