12" x 18" White Poly Cutting Board Our poly cutting boards are made of High Density Polyethylene Plastic (HDPP). What does this mean?? It means that these cutting boards are made from THE BEST material out there. Thickness: 1/2", 3/4", or 1" (how thick the board is). 1/2" is the most common thickness Color: White 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.