We R Memory Photo Sleeves were developed specifically for scrapbooking with photo storage in mind. Created out of premium heavyweight, low glare, ultra clear polypropylene film, they are acid and PVC free and of archival quality. These sleeves will not stick to photographs, memorabilia, or photocopies. 4"x 4" Waterfall 20pc- Individual pockets that can be fused together, with #WER662567 Photo Sleeve Fuse, to create waterfall additions to other full-size pages. Fuse your waterfall section together first, then fuse the top pocket to the full page.