These Aromatherapy Diffuser Necklaces Allows You To Wear Your Favourite Essential Oils Wherever You Go. Each Locket Contains a Tiny Piece Of Pad Which Holds a Few Drops Of Oil That Slowly Diffuses Through The Ventilation Holes On The Front. The Lockets Are 1.18 inch (3cm) In Diameter and 0.19 inch (0.5 cm) Thickness and Are Made From Stainless Steel To Ensure The Oils Don't Tarnish Or Breakdown The Metal. Each Necklace Comes With 10 Assorted Colour Pads and The Chains Length are approx. 23.6 inch (60cm) We are adding 10 more pads for free too!