Gardiant shape,to make size from 22-23 inch, should be fit for most heads of adult.
With breathable vents on the top, avoid being too heat even in summer.
Reuqest will not be accepted since size has been described so clearly
All orders will be shipped in one working day,by FC of Postal or other delivery in same level
On Apr-15-21 at 10:36:04 PDT, seller added the following information: