Without feeling choke or other uncomfortable sensations when the chicken wear this collar. This rooster collar is designed to significantly reduce the volume and frequency of crowing by restricting air expulsion.Adopted adjustable circumference design, this rooster collar can fit for most rooster neck circumference and easy to wear without falling off easily.It is made of high-quality nylon material.The length of this product is 20cm and thickness is 2cm.This product is perfectly suitable for chicken, rooster, etc.Item Name: Rooster CollarMaterial: NylonFeatures: Adjustable, Reusable, Super SoftSize Details: Size: 20cm x 2cm/7.87" x 0.79" (Approx.)Notes:Due to the light and screen setting difference, the item's color may be slightly different from the pictures.Please allow slight dimension difference due to different manual measurement.Package Includes:2 x Rooster Collars