Note: Only the storage strap is included. Please attach a string while it is rolled up tightly. (Details) Actual Size when laid flat: Length of the string: Approx. 57.1 inches (147 cm) (adjust to the size of the mat) / No stretch; Material: 100% polyester; Made in China; Just put it on and pull the string for easy storage. ■ It can be adjusted to the size of the mat you have.