Full Mattress 12 inch Gel Memory Foam Mattress Medium Firm Mattresses for Cool Sleep Relieving Pressure Relief CertiPUR US Certified Mattress in a Box ToiletTree Products this chess board is a 75 width this chess board is a comfortable size to play for all age groups which is why we offer a 30 day "100% Satisfied or your Money Back" warranty Get it Right the First Time It is also a good idea to know the size and the height of your mattress ahead of time to make sure you are ordering the correct size Gel infused memory foam keeps you cool during sleep and body contouring memory foam reduces pressure points and properly aligns the spine