Puppy Spiral Tree Spider Printed Halloween T-shirt Dress Dog And Owner Matching OutfitsSize Neck Girth Chest Back Length Weight S 11. 8 15. 7 11. 8 5 10 lbs M 13 17. 7 13 11 16 lbs L 14. 2 19. 7 14. 2 17 24 lbs XL 15. 4 21. 7 15. 4 25 32 lbs 2XL 16. 5 23. 6 16. 5 33 40 lbs 3XL 17. 7 25. 6 17. 7 41 48 lbs Size US Bust Waist Hips XXS 4 77~83 65~71 87~93 XS 6 83~89 71~77 93~99 S 8 89~95 77~83 99~105 M 10 95~101 83~89 105~111 L 12 101~107 89~95 111~117 1X 14 107~113 95~101 117~123 2X 16 113~119 101~107 123~129 3X 18 119~125 107~113 129~135