The multi-hole system on these page protectors allow them to be used with any 12X12 album type. There are 11 total holes (5 circle and 6 elongated) and will work with both post bound and binder styles. Page protectors are top-loading and acid-free. More Info: MULTICRAFT-Multicraft Imports-Forever In Time Scrapbook Collection: Page Protectors. The multi-hole system on these page protectors allows them to be used with any 12x12 album type. There are eleven total holes (five circle and six elongated) and will work with both post-bound and binder style albums. This package contains five 12x12 inch top-loading page protectors. Acid free, archival quality. Imported.BICW