Size Reference: Overall size of the jewelry making beading mat is about: width about 30cm/11.8inch, length about 28cm/11inch, thickness about 10mm, please refer to the picture for details of the inner diameter. Hard Back of Wood and Felt: Hardwood material is added to the back to make the beading board thicker and sturdier, won't bend. The surface is made of felt and the beads are not easy to roll. Beading Design Board: These mats are convenient for jewelry making and can help design different styles of necklaces or bracelets. Individual Grids: The individual grid design keeps beads of different colors orSizes organized and not mixed together, making it easier to make jewelry. Wide Application: Perfect for beginners and craft enthusiasts to use for beading work to complete DIY production of necklaces, bracelets, earrings or other jewelry craft projects; it can also be used as a workbench for repairing jewelry.