Show me boards with squares show me bsrg the show me supertough a4 boards with squares is a bulk pack of 100 popular gridded show me boards that are very durable and ideal for educational purposesincredibly well designed with extra thickness for strength 1500 micron these unique boards are also semi rigid and very tough but at the same time remain very lightweight printed one side with a light blue grid pattern forming 20mm squares with a plain reverse side for standard show me activit