Available sizes S-M (5.5-6.5) M-L (6.5-7.5) and L-XL (7.5-9) inches (circumference of your wrist) The cage for the FitBitÂ® flex chip is made from stainless steel . The band is made from real leather. You can see the indicator lamps of the chip all the time during wearing. No need to get the chip out of the bracelet. All decoration parts are made from stainless steel as well.. NO NICKEL is used! How it Works: I engineered a fashionable way to securely hide your FitBitÂ® flex fitness tracker perfectly within a beautiful bracelet! So rather than wearing the rubber band that comes with your chip, simply use this elegant bracelet to dress up your look! No one will have any idea you are wearing a fitness tracker! You can see the indicator lamps of your Fitbit Flex chip all the time. No need to remove the chip from the bracelet to check on your process. Ideal to wear on just about any occasion - dates, parties, to the office, weddings or any event! Highlights: - Never lose your Activity Tracker again - Super secure. - Don't ruin your professional or dressy outfit with a plastic wristband - Beautiful & high quality, it can be worn with or without your tracker. - I create stunning and unique pieces that are designed to take you from day to night! NOTE: FITBIT DEVICE NOT INCLUDED. Fitbit and the Fitbit logo(s) are trademarks of Fitbit, Inc. This item is NOT endorsed by FitbitÂ®. fitjewelsTM does not assume responsibility for loss or damage of any kind that comes to your FitbitÂ® while using this item. This pendant is intended as an alternative to the traditional rubber band when dressing up your look and is NOT intended for wear during high impact or strenuous activities. Insert and remove Fitbit device from the back compartment carefully so as not to damage it.