The ring is 6mm wide (about 1/4"). It is made of aluminum and it's adjustable in size. I have them in two sizes, the S-M will fit sizes 6-9, the L-XL 9-13.
Delivery times are about:
For Europe: 4-14 working days
For USA: 3-7 working days
For Canada: 3-7 working days
For Australia, Singapore & New Zealand: 12-20 working days
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