Security Dog Tank. Bow Wow Bouncer! Perfect for the tough pup, or the small dog that thinks they are a big dog. This Security dog Tank features fun writing with personality atop a ribbed black tank. Features: – 100% cotton. – Hand silkscreened. – Machine wash and dry. Sizes: XS: Chest Girth 9-11 in. x Shirt Length 6.5 in. x Weight 1-3 lbs. S: Chest Girth 10-15 in. x Shirt Length 8.5 in. x Weight 4-9 lbs. M: Chest Girth 12-17 in. x Shirt Length 11.5 in. x Weight 10-26 lbs. L: Chest Girth 18-23 in. x Shirt Length 14.5 in. x Weight 27-49 lbs. XL: Chest Girth 20-30 in. x Shirt Length 16.5 in. x Weight 50-90 lbs.