STUDIOSPARES SOUNDPROOFING FOAM Inch-thick (25mm) fire-proof foam as recommended in Sound on Sound`s guide to soundproofing your studio, this DX40F foam comes in 3 convenient sizes: the length is a standard 2.34m (7 feet 6 inches), while available widths are 1.85m (about 6 feet), 15.4cm (about 6 inches) and 25mm (1 inch). Can easily be cut to size with a sharp knife. 2340 x 154 x 25(mm) This size available in grey only.