This is an authentic Alex and Ani. They offer a one size fits most everyone. The charm is an “Sister” Charm with flowers on it and there are 3 smaller charms dangling. A perfect bracelet to show your “BFF”, or “Sister” of origin how much you care. These are made in the USA and eco-friendly. Expandable from 2" to 3.5" Rafaelian Silver/Gold® Nickel-free