Product dimensions 11, 1.6, 0 2 inches, item weight 0.6 ounces, shipping weight 0.6 ounces, application perfectly fit for apple watch series 2 series 1 nike edition and hermes all, apple watch 42mm models, apple watch series 4 series 5 44mm, m l size, suited for 6, 3, 8.3 inch wrist 160 and 210mm, security the silicon strap has lugs on both sides locking onto apple watch precisely and securely it is easy to install or remove, innovation row after row of compression molded perforations.