This adjustable chicken harness is a tried and tested chicken of all shapes and is sized to fit hens and ducks from 2-12kg, there are many sizes they will love this custom size. Breathable Nylon Material: Allows the rooster's skin to breathe freely and has a certain elasticity, making the rooster and hen more comfortable.Stylish Bow Design; The chick dress has a beautiful bow on the front, which is very cute and becomes more fashionable for pets. more obvious EASY TO DO IT: Each garment features a 43" drawstring, making it easy to train chickens to walk, put on and take off. Avoid problems with donning and doffing and causing damage to your pet's hair. Size: S---- neck circumference 24cm, bust circumference 30-40cm, suitable for weight below 3-5kgM---- neck circumference 29cm, bust circumference 35-50cm, suitable for weight below 6-12kg