We know your dog is the local Heart Breaker because they are just so damn cute. Give those other dogs at the park a bit of a warning that here comes the hottie and whatever happens you have been warned. Paw-fect for Valentine's Day! Available in 7 sizes. 1: Collar: 12.9-13.4 in. Underarm: 15.4-15.7 in. Length: 11-11.4 in. Underside Length: 7.5-7.9 in 2: Collar: 13.4-13.8 in. Underarm: 18.5-18.9 in. Length: 12.6-13 in. Underside Length: 8.7-9 in 3: Collar: 15-15.4 in. Underarm: 20.1-20.5 in. Length: 15-15.4 in. Underside Length: 9.1-9.4 in 4: Collar: 16.5-16.9 in. Underarm: 22.4-22.8 in. Length: 16.1-16.5 in. Underside Length: 11-11.4 in 5: Collar: 20-20.5 in. Underarm: 26.4-26.8 in. Length: 18.5-18.9 in. Underside Length: 12.9-13.4 in 6: Collar: 20.5-20.9 in. Underarm: 30.3-30.7 in. Length: 24.4-24.8 in. Underside Length: 16.5-16.9 in 7: Collar: 20.9-21.3 in. Underarm: 34.3-34.6 in. Length: 27.2-27.6 in. Underside Length: 18.1-18.5 in