One-piece" design: no buckles or clips, just a slider to adjust the harness. Automatic elastic drawstring adjustment: automatically adapts from the chest to the back as the bird climbs and flies, the effective drawstring design reduces the bird's stress contact points. A MUST: This parrot leash is a must for anyone who likes to take their bird out for fun. QUALITY MATERIALS: The pull rope is made from strong nylon webbing that is rubberised and bite resistant. Adjusts to life's tastes: all you need is a little patience and plenty of food, and almost any bird can be trained to wear it. Adds fun to life. Product description Name: Flying Parrot Rope Material: Nylon rope Size reference (approx.) (1 cm = 0.39"): XS: Head length is 5.5cm and head to body height is 5cm. Elastic band length is 137cm and diameter is 1.5mm. Length of nylon cord is 47 cm, width 1 cm, total length of cord is 120 cm; weight 25 g; parrot reference: 75-110 g Size s: head length 6.5cm, head to body height 6.8cm. elastic band 156cm long, diameter 1.5mm. nylon rope length 46cm, width 1cm, total rope length 120cm; weight 59g; parrot reference: 110-190g Size m: head length 7.5cm, head to body height 8cm. Elastic band 137cm long, 2.5mm diameter. nylon cord length 52cm, width 1.1cm, total length of cord 120cm; weight 59g; parrot ref: 190-420g L: Head length 9cm, head to body height 10cm. elastic rubber band 199cm long, diameter 2.5mm. nylon rope length 62cm, width 1.1cm, total rope length 120cm; weight 60g; parrot ref: 425-600g. Size xl: head length 10.5 cm, head to body height 12.5 cm. Elastic band 135cm long, 3.5mm diameter. 79cm long, 1.1cm wide nylon rope, total rope length 120cm, weight 51g, parrot reference: 600-1000g. Package includes: 1x Parrot Rope (random colour)"