[Diameter 0.8 inches (about 0.2 cm)] Our upgraded sports bag is 0.8 inches (about 2.0 cm) larger in diameter than other sports bags. Overall size :31 inches long x 7.5 inches in diameter, can accommodate a yoga mat measuring 69 inches long x 23 inches wide x 2/5 inches (10 mm) (23 inches wide and 7 inches in diameter when rolled up). The quick-opening drawstring allows you to grab your mat quickly, whether you are traveling with a yoga mat or yoga training (yoga mat not included) [1 separate bottom wet bag] This yoga bag is thoughtfully designed with a zippered waterproof wet bag with a bottom height of 3.2 inches (about 8.1 cm). It can be combined with a sports bra and a pair of full-length leggings, or other personal necessities such as a yoga band, towel, travel convenience set, etc. [2 external pockets] The outside has a wide pocket with a front drawstring, which can hold water bottles, umbrellas, small dumbbells, skipping rope or other sports accessories. A small external side zip pocket (7.8 inches long, about 19.8 cm) for quick storage of your phone, keys, wallet, ID and essentials, keeping your valuables tight and secure