Regulation Vinyl Tournament Chess Board - 2.25" - by US Chess Federation Manufactured out of high-grade vinyl, designed to resist tears, spills and the most demanding of abuse. Measures 20" x 20" with 2.25" Squares and features the Rank/File Labels Perfect for Youth, Scholastic, and Tournament Chess Players Exceeds all US Chess Federation and FIDE Requirements for Official Tournament Use Manufactured Exclusively by the United States Chess Federation (USCF)