VIVAGLORY Dog Life Vest Size Chart

Size	Chest Circumference (in)	Back Length
XS	17–20	na
S	19–23	na
M	22–25	na
L	26–31	na
XL	31–39	na

How to Measure: Measure around the widest part of your dog's ribcage, just behind the front legs. Chest circumference is the recommended measurement for selecting the correct size. If your dog is between sizes, choose the larger size.