Room or wall dimensions Length (ft) Width (ft) Tile size (inches) 4 x 4 6 x 6 12 x 12 18 x 18 24 x 24 Custom Tile width (in) Tile height (in) Grout joint size 1/16 in 1/8 in 3/16 in 1/4 in 3/8 in 1/8 inch is standard for most floor and wall tiles.
