Oversize Float Glass Over size float glass is a very large size glass sheet made by floating molten glass on a bed of molten metal, typically tin, glass float on the tin surface naturally formed on both sides of the smooth surface, then cool and grow out of the tin cylinder strip slowly. After being polished by fire, it becomes nearly completely over size flat glass. It is commonly used in building of unique design in our daily life. Over size float glass is a clear, distortion-free glass that we offer in a wide range of large sizes and thicknesses to suit any flat glass application.