6mm ruled memory foam. Made with thin and hard to hang tomoe river. Thin enough for mini 5-hole sized binder with small ring diameter... Holds 100 sheets in 8mm rings... Pack of 100 Mini 5 hole size Size: Height 5.9 inches (150 mm), Width 2.5 inches (63 mm), Thickness 0.2 inches (5 mm). Item Color Trend:White Paper Color: Off-White Note Pages: 100 ruled pages