The band size you need is dependent upon the size of your Forerunner's watch face. Small-Display Size: 0.81"x0.77"(21 x 20 mm). Large-Display Size: 0.98"x0.94"(25 x 24 mm). When purchasing, please check your watch display size The bands come in 2 sizes: small and large. The large bands are for models that have a slightly larger Watch face and a wider wristband Pins and pin removal tools included. Easy and direct installation and removal. Comfortable to wear Keep your training on track - and be stylish - with these colored bands for your forerunner 10/15 Soft silicone with smooth finish for a sporty look, metal parts made with high quality stainless steel Band for Garmin Forerunner 10 15 Soft Silicone Replacement Watch Band Strap for Garmin Forerunner 10 15 - BKFKBPJSH