It as always time efficient and more conducive to proper installation when the largest available size is used to fit the application. Nominal Armor-Tile Cast-In-Place Length and Width Sizes are [12”x12”] [24″x24″] [24″x36″] [24″x48″] [24″x60″] [36″x48″] [36″x60″]. Nominal Armor-Tile Surface Applied Length and Width Sizes are: [24″x24″] [24″x36″] [24″x48″] [24″x60″] [36″x48″] [36″x60″].