Manetti 23kt-Deep-Yellow-Double-XX Gold-Leaf Patent-Pack of 1-books-gold-leaf contains 25 sheets of Gold-Leaf, size-3-3/8" x 3-3/8", Surface/Loose-Leaf, 18 Gram Weight 23.kt. Deep-yellow gold is a very early Karat weight. Manetti 23kt-Deep-Yellow-Double-XX Gold-Leaf Patent-Pack is packaged attached to white-paper and placed between the sheets of paper in each book of Gold. Patent or Attached Gold-Leaf is attached to paper to assist in transferring thin delicate Gold-Leaf to avoid damage from wind or wrinkle. Patent-Leaf is help-full if you haven't learned to use a gilders Tip. Each Gold-Leaf Pack contains 20 Books or 500 sheets. Each Book contains 25 sheets of gold-leaf, sheets of Gold Leaf measure 3-3/8" x 3-3/8" inches square. 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-Deep-Yellow-Double-XX Gold-Leaf Patent-Pack available here.