Use 2" (5.08 cm) Foam Sheets for layout and diorama bases, as well as to form tunnel walls, ceilings or overpass supports. Pin with Foam Nails and glue in place with Foam Tack Glue™ or the Low Temp Foam Glue Gun and Glue Sticks. Each Foam Sheet measures 12"w x 24"l (30.4 cm x 60.9 cm) 1 sheet/pkg