Stall Mats 4" x 6" x 3/4" - Equestrians that demand the very best have chosen stall mats for over 25 years. For this reason Ultimate RB is the largest manufacturer of stall matting in the United States. When you ask for stall mats you can be sure that the mats you take home will be the highest quality, environmentally friendly and made in the USA. We stand fully behind each mat we produce with a 15 year limited warranty.