Product information for 18k Genuine Gold Leaf: 75.0% Au, 25.0% Ag Thickness of each leaf: 0.12 microns Dimension 3-1/8” x 3-1/8″ Booklet covers: 1 5/6 sqft Our 18K Genuine Gold Leaf is also available in 4 booklet packages for both the loose and transfer types. A total of 100 leaf sheets.