This blocking board is perfect for wet blocking crochet and knit granny squares. These blocking boards are available in several wood species. If we are out of stock in the wood you would like, just message me and we can make you exactly what you are looking for. This Blocking Board is set up for squares, with a blocking space of 12"X12" (in approximately 1 1/2 inch increments). All of your boards are made of 100% natural domestic and exotic hardwoods. These are a natural, wood product, so each board is unique, due to wood grain patterns, knots, etc. Unlike boards made with bamboo and plywood, natural hardwoods won't separate over time like plywood blocking boards. Hardwoods also have a lower environmental impact than bamboo which is mainly glue and bamboo fibers. Overall board is 13" X 13".