HOW TO MEASURE YOUR DOG Measuring should be done along the dog's backbone from the base of the neck to the base of the tail. SIZE CHART LENGTH FROM NECK TO TAIL EXTRA SMALL UP TO 6"- 8" SMALL UP TO 8"-10" MEDIUM UP TO 10"-12" LARGE UP TO 12"- 14" XL UP TO 14"- 16" XXL UP TO 16"- 18" XXXL UP TO 18"- 22" XXXXL UP TO 22"- 28" SIZE CHART