Specifications: Tack index compatible with handwriting, inkjet printers, and title brains. Material: Normal paper: Paper thickness: Approx. 0.05 inches (0.14 mm); Body size: Label dimensions: 0.9 x 1.1 inches (23 x 29 mm); Sheet dimensions: Postcard size: 5.8 x 3.9 inches (148 x 100 mm); Quantity: 120 sheets (12 sheets x 10 sheets). Strong adhesive type.