Leg Avenue Dog Costumes Sailor Sweetie has everything you need to transform your pet into a sweet little sailor. This costume includes the dress with velcro closure and matching hat. Sizing Help for Dogs: XS- For a small Yorkie, weight is about 3 lbs. S - For a small Chihuahua, weight is about 5-7 lbs. M - For a 7-10 lbs. dog. All Pet Costume sales are Final. No returns or exchanges.