King Richard III Boar Banner Mouse Mat. made from recyclable rubber and depicting Richard's motto of Loyaulte Me Lie.. This mouse mat will make a great gift or office accessory. Richard III became King in 1483 and reigned for 2 years. He died at the Battle of Bosworth on August 22nd 1485 and was succeeded by Henry Tudor who became King Henry VII. The dimensions of the mouse mat are: 9 inches x 7.5 inches.