There are three basic types of solid wood flooring. Strip flooring will account for the majority of installations and is usually 2 1/4" wide ranging in widths from 1 1/2 " to 3 1/4" and is installed by nailing it to the sub floor. With plank flooring, they are 3 inches wide and may be screwed to the sub floor as well as nail in. The screw holes are then covered with wooden plugs. The last most common variety is parquet flooring. It comes in standard patterns of 6" x 6" blocks. You can find specialty patterns on the market that range up to 36" square units. You can create dramatic geometric effects and special, design patterns with this type of flooring.