The Tekmat Glock 42-43 gun cleaning mat measures 11 x 17 and is 1/8 thick. The over-sized design gives you plenty of room to disassemble your handgun and to clean it without having to move parts all over. This mat comes with an overview of the history of the Glock 42-43 as well as a simple to follow parts diagram of the parts that make up your Glock.