Woo Woo Pets Dog Life Jacket Adjustable Dog Life Preserver SIZE INFORMATION: [XXS]: Chest 9.1"-11.8", Neck 7.5"-10.6", Back Length 5.9", Dog's Weight 0-2Kg; [XS]: Chest 9.8"-13.8", Neck 7.9"-13.8", Back Length 7.9", Dog's Weight 2-4Kg; [S]: Chest 14.2"-17.7", Neck 13.8"-17.7", Back Length 9.8", Dog's Weight 3-7Kg; [M]: Chest 15.7"-21.7", Neck 15.7"-18.9", Back Length 11.8", Dog's Weight 7-10Kg; [L]: Chest 19.7"-25.6", Neck 16.5"-21.3", Back Length 13.8", Dog's Weight 10-20Kg; [XL]: Chest 26.4"-35.4", Neck 18.9"-27.6", Back Length 17.7", Dog's Weight 20-40Kg; [XXL]: Chest 32.7"-46.9", Neck 24.4"-35.4", Back Length 18.9", Dog's Weight 40-50Kg MATERIAL - Thickended nylon exterior and interior material ensures durability, outfitted with adjustable belt, safe and comfortable ITEM SPECIFIC - Considerate design ensures easy rescue in emergency, woo woo pets dog life jacket swimsuit, designed with front float to keep the dog's head above water, top grab handle for easy rescue by hand or boat hook in the water, reflective strip on the back part ensures it is easy to locate the dog while he or she is having fun in the water DELIVERY TIME - Free shipping by USPS delivery in 10-15 working days if you choose [Standard Shipping]