The John Boos 18 x 12 x 2 1/4 inch RA cutting board in walnut is a great choice when you want a thicker board. Measuring 2 1/4 inches deep, the cutting surface of this John Boos cutting board is durable. It is made in the USA from walnut. The wood's hardness ensures a sanitary cutting surface that resists warping and will outlast cheaper, softer cutting boards.