A Classic. I wear one myself. Looking heavy and massive - bracelet that man can never leave behind, and some ladies also enjoy it's strong look and powerful feeling.
Standard size is made of 9 black&white chequered elements (ca. 2x2cm) connected with hinges and a lock with decorated button, all ca. 21cm long and about 90gr weight.
Smaller/Ladies size is also available - with 8 elements + lock - ca. 19. cm long.