I-SMILE Colorful Replacement Bands with Secure Silicone Fasteners and Metal Clasps for Fitbit Alta(No tracker, Replacement Bands Only) Size:Large 6.3""-8.3"", Small 5.4""-6.9"". Free size fit your wrist depend on button site you place Comfortable for sporting time,Look good no matter what you are wearing Silicone Fasteners - Prevent the clasp loose and fall off, Keep your Fitbit Alta Band safe Free size wristband accessory ,High quality and Replacement for lost or damaged Bands COMPATIBLE WITH FITBIT ALTA - For Fitbit Alta only(Not for For Fitbit flex, blaze, Force or other models(Note: Fitbit Alta Fitness Activity Tracker is not included)