The more you know, the better we look™ What are Metal Dimensional Letters? There are three basic kinds of metal letters, all of which are made to order in many typestyles, sizes, colors and available finishes. INDEX Flat-Cut Metal Letters Foundry Cast Metal Letters Fabricated Metal Letters and Fabricated Metal Letters, Lighted What's the difference in the kinds of metal letters listed in the index above? Flat letters are, as the name implies, letters made from flat metal. The thickness of the letters is based on the available metal choices, usually ranging from 1/8" (0.125") to 1/2" (0.5"). Available materials include Aluminum, available in 1/8, 1/4, 3/8, 1/2, 3/4" Copper , available in 1/8, 1/4, 3/8" Brass , available in 1/8, 1/4, 3/8, 1/2, 3/4" Bronze , available in 1/8, 1/4, 3/8, 1/2" Steel , available in 1/8, 1/4, 3/8, 1/2, 3/4" Flat cut letters in aluminum may be anodized for greater strength...