Manetti 80mm-Platinum-Leaf Patent-Pack of 20-books-platinum-leaf contains 500 sheets of Platinum-Leaf, size-3-3/8" x 3-3/8" 20 gram weight. Manetti 80mm-Platinum-Leaf Patent-Pack is packaged attached to white-paper and placed between the sheets of paper in each book of Platinum. Patent or Attached Platinum-Leaf is attached to paper to assist in transferring thin delicate Platinum-Leaf to avoid damage from wind or wrinkle. Patent-Leaf is help-full if you haven't learned to use a gilders Tip. Each Platinum-Leaf Pack contains 20 Books or 500 sheets. Each Book contains 25 sheets of Platinum-leaf, sheets of Platinum 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. Manetti 80mm-Platinum-Leaf Patent-Pack available here.