Hermes Kelly 18 belt Noir. Streamlined Style Follow these steps to determine your hip measurement. To adjust to the proper size, gently slide the loops. Thanks to an agile gliding system, it adapts to all sizes and various outfits. The signature Kelly clasp makes it easy to add to your collection! Leather belt in Epsom calfskin with palladium-plated Kelly buckle. Thanks to a clever sliding system, this one-size-fits-most belt may be worn at the waist or on the hips.