Alfie Pet by Petoga Couture - Terris Sailor Tank - Color: Blue Size Medium best fits neck girth: 10", breast girth: 16", and body length: 11". Sizing for each dog is unique. We highly recommend you measure your pet precisely with a flexible tape measure to ensure the best fit. Contact us if you have question. We are happy to help. This sailor tank is awesome and stylish! Easy to put on and comfortable to your little baby. Perfect for every day walk and weekend party. Try one on your doggie today!