This adjustable chicken harness is a tried and true chicken of all shapes and is sized to fit chickens and ducks from 2-12kg, there are many sizes they will love this custom size. Breathable Nylon Material: Allows the cock's skin to breathe freely. and has a certain elasticity, which makes the rooster and the hen more comfortable. Sleek arc design; The chick dress has a beautiful bow on the front, which is very cute and becomes more fashionable for pets. more obviousEASY TO MAKE: Each garment has a 43" drawstring, making it easy to train chickens to walk, put on and take off. Avoid trouble with putting on and taking off and damaging your pet's hair.Size: XS-----Neck circumference 17cm, chest circumference 23-35cm, suitable for weight under 3kgS---- neck circumference 24cm, chest circumference 30-40cm, suitable for weight less than 3-5kgM---- neck circumference 29cm, chest circumference 35- 50cm, suitable for weight less than 6-12kg