Material: PU Color: black,brown Size: XS(Within 0.5-5 kg) front mouth10-13cm,back mouth13-17cm,belt length 32cm S (Within 4-12.5 kg) front mouth14-18cm,back mouth18-22cm,belt length 38cm M (Within 10-25 kg) front mouth19-22cm,back mouth23-27cm,belt length 43cm L (Within 22.5-37.5 kg) front mouth23-26cm,back mouth29-33cm strap length 45cm XL(Within 37.5-55 kg) front mouth24-28cm,back mouth30-35cm,belt length 48cm Features: It is breathable and good workmanship. It is adjustable and can prevent the pet from biting. It has five sizes for your choose. Package Included:1 pc Kindly Tip: 1. Item Measure by hand, it could be 1-3cm different. hope you can understanding, will be sincerely appreciated. 2 .Please be reminded that due lighting effects, monitor's brightness/ contrast settings etc, there could be some slight differences in the color tone of the website's photo and the actual item.