Feature: Free size that adjust by the button site.Choose different color to change mood in daily life. Beautiful color for your choice and can get variety color then change every day and fit your clothes. Nice replacement accessories for Fitbit Flex wristband. Large Size:6.3-8.3 Inches / 161-210 mm. Band Width:0.6 Inches / 13.9 mm. Small Size:5.5-6.9 Inchs / 140-176 mm. Band Width:0.6 Inches / 13.9 mm. Includes: 1pcs Replacement Bands with Metal Clasps for Fitbit FLEX Only /No tracker.