Compatible with Fitbit Charge 5 Large size: 10 inches/250mmSmall size: 8.5 inches/215mmThe Fitbit 5 strap made of soft and smooth silicone ,The latest tensile materials, strong toughness, not easy to break .Which is durable and lightweight. Comfortable touch feeling free your wrists when you with the silicone sport Fitbit Charge5 band Accurate mold positioning, no error, perfect for your Fitbit Charge 5Simple packaging, avoid unnecessary waste of resources,We provide 1-year warranty for the silicone Fitbit Charge 5 bands, includes 1-year unconditional refund or free replacement.