Manetti 12kt-Glass-White Gold-Leaf Surface-Pack of 20-books-gold-leaf contains 500 sheets of Gold-Leaf, size-3-3/8" x 3-3/8", Surface/Loose-Leaf, 18 Gram Weight 12kt. Glass White-gold is a very early Karat weight.Manetti 12kt-Glass-White Gold-Leaf Surface-Packis surface-leaf therefore it is Loose-Leaf. A packs coverage area is 39.5 square feet and each Book of 25 sheets has a coverage area of 1.98sq ft. without consideration for waste or overlap. This product is great for glass gilding and surface gilding. It is loose in the book and should be applied with a gilders tip or other method of transfer. Manetti 12kt-Glass-White Gold-Leaf Surface-Pack available here.