These are 7" 45rpm paper inner sleeves with a hole. The inner sleeves have square corners and are made from 20# heavy-weight paper. These sleeves are archival quality: acid-free, and alkaline-free! The paper used to make these are also certified by the Sustainable Forestry Initiative, and made with 30 percent post consumer waste. Replace your worn out or torn inner sleeves and freshen up your collection. These go over the naked vinyl record and slide into a jacket or outer sleeve.