Playmat - Boo's Astral Menagerie - Dungeons & Dragons Cover Series Bring your favorite adventures to the table with the Cover Series Playmats for Dungeons & Dragons. Made with a soft fabric top and rubber backing, not only will your cards, miniatures, or specialty dice be protected, but also the table below when rolling dice. With dimensions of approximately 24 in. x 13.5 in., this playmat is also the perfect decorative oversized mousepad for your home or office. Non-slip rubber backing lets the playmat lay flat and prevents it from shifting during use.