Dress your dog in this stylish sweater. Offering a lightweight, soft, warm quality, it has an almost cashmere-like feel your chic canine appreciates. Isabella Cane Sweaters w/ Exclusive Custom Yarns. Recycled Acrylic Yarn Fibers are lightweight, soft, warm, with a Cashmere-like feel. Each Sweater is resilient, retains shape and resists shrinkage and wrinkles. Hand Wash Cold Water Hang Dry. Quick drying and colorfast. Measure Dog's back from neck to tail and the girth of the dog's body - circumference of the body behind front legs - for a perfect fit. Sizes: XS fits yorkie, chihuahua dogs up to 5lbs. length of back 9"-11" S fits small breeds up to 9lbs length of back 11"-13" M fits small-medium breeds up to 14lbs length of back 14"-16" L fits medium dogs up to 25lbs length of back 17"-19" XL fits medium breeds up to 45lbs length of back 19"-21"