18" x 24" Richlite Cutting Board Originally made for aerospace and industrial markets, richlite material is unparalleled in strength and performance. Richlite is made from resin-treated paper, which is then pressed and baked to create a solid and durable sheet. What does this mean?? It means that these cutting boards are made from THE BEST material out there. Thickness: Available in 1/2", 3/4", and 1" (how thick the board is). 1/2" is the most common thickness Size: These boards are custom manufactured to the size you need, so look above and select the length and width you need. Please remember to be very accurate (to the 1/8"). We also can round the edges if you would like. By default they will come with non-rounded edges.