Features: Quality Material: Made of high-quality nylon, safe and durable. Size: There are 2 versions. Normal size is about 7 inches in length, 0.8 inches in width; Upgraded size is about 8 inches in length, 0.8 inches in width. Colors: 5 colors to choose from. Red, Black, Blue, Green, and Yellow. Adjustable size: Hook and loop closure design. Suitable for chickens, ducks, geese and other poultry. Rooster collar: The no crow rooster collar could not guaranteed to fully stop your rooster from crowing. The noise neck belt is designed to significantly reduce the volume and frequency of crowing. Results may vary from roosters to roosters, and are dependent on the person doing the fitting. Specifications: Material: Nylon Color: Red/Black/Blue/Green/Yellow Style: Normal/Upgraded Size (Approx.): Normal-18x2cm/7.09x0.79in Upgraded-20.5x2cm/8.07x0.79in Weight (Approx.): Normal-8g Upgraded-12g Note: 1.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! Package includes: 2 Pieces No Crow Rooster Collar (Red/Black/Blue/Green/Yellow,Normal/Upgraded)