These are necessary and fantastic additions for any scrapbooker who loves to layer their layouts. Each spacer adds 2mm between pages to make extra room for dimensional layouts with gems, chipboard, foam and more! Can be used individually or several for those pages that need even more room. Spacers work with 12x12 inch and 8-1/2x12 inch 3- ring binders, postbound albums and staple-strap albums. This package contains twelve spacers. Archival quality. Acid free. Photo safe. Imported.