Dog Apparel Clothes Jacket & Sweatshirt Halloween Pumpkins Designer Pet Sweaters Size Medium: Back length 12", Neck girth 13", Chest 14-15" Measure your dog from the base of the neck to the base of the tail for back length. Made with 100% acrylic material for ease care and durability Machine-washable with similar color items in cold water on the gentle cycle Comfortable, warm and a great option for any chilly morning and night