100 Sheets Chipboard 24pt (point) 3.5 X 5.5 Inches Light Weight Recipe Index Post Card Size .024 Caliper Thickness Cardboard Craft Packaging Brown Kraft Paper Board Thin Chipboard 24pt (point) - .024" inch thickness = .61mm = 6 sheets copy paper Backing for notepads, photos, and prints Make your own albums, frames, displays, covers, backs, boxes and containers Protect your shipments - Storage of keepsakes and papers - 100% recycled clean fibers