About this item FIT: Please note this ear hooks fit New Studio Buds 2021 only. Not compatible with the others ANTI-SLIP: Ergonomic design earhooks fit your ears perfectly and securely. Great for running, jogging, cycling, and any other activities COMFORTABLE TO WEAR: Made from premium silicone material with ultra-light weight, ensuring long-lasting comfort to your ears EXTRA SILICONE POUCH: The Studio Buds are not chargeable with the ear hooks; store the ear hooks in the pouch to charge your Studio Buds Product dimensions: 3.27 x 2.76 x 0.67 inches.