MANUFACTURES SIZING CHART AS FOLLOWS
XS 6" TO 9" 2-6 LBS.
SMALL 10" TO 13" 7-12 LBS.
MEDIUM 14" TO 16" 13 TO 18 LBS.
WE HAVE MEASURED AND HERE ARE OUR FINDINGS
XS 7 1/2" LONG CHEST 10"
SMALL 11" CHEST 16"
MEDIUM 14" CHEST 18"