Set of 3 Calame Bamboo Reed Pens X-Large size: Diameter: ~1-1/4"(3cm); ~7-3/4"(19.5cm) Large size: Diameter: ~ 7/8(2.2cm); ~10"(25.5cm) Medium size: Diameter: ~1/2 "(1.2 cm); Length: ~7 "(17.5 cm).