Manetti 23kt-Double-XX 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, 16 Gram Weight 23kt.  gold is a very early Karat weight. Manetti 23kt-Double-XX Gold-Leaf Surface-Pack contains 25 sheet of gold-leaf, size 3 3/8" x 3 3/8" per sheet. This is 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 23kt-Double-XX Gold-Leaf Surface-Pack available here.