Can you not function without essential oils in your life? This diffuser bracelet allows you to fashionably wear them all day. The bracelet is made of colorful glass beads & lava beads, which you can add 1-2 drop(s) of your favorite essential oil. **PLEASE NOTE~ Bracelet does NOT come with essential oil...Essential Oil sold separately @ https://endlessxpressions.com/collections/oils SIZING This bracelet is stretchy. To determine what size you need, be sure to measure your wrist. Measure where you'd like the bracelet to sit with a tape measure or wrap a string around your wrist and then measure the string - whichever is easiest for you. Consider adding .5" - 1" depending on how snug or lose you want it to fit.