This light weight chip board is the thinnest we carry. 375 gsm (grams per square meter). Calipers at .020 inches. 20 Point CHIPBOARD is as thick as 5 sheets of 20# plain copier|printer paper. (.508mm thick) | Protect your shipments and storage of keepsakes and papers. Backing for notepads, photos, and prints. | Make your own albums, frames, displays, covers, backs, boxes and containers | Search -> amazon.com/shops/ThunderBoltPaper | Go To -> STORE: Click on ThunderBolt Paper under title