Dog Life Jacket Sizing

Size Chest Size Dog's Weight Flotation
XS 18" - 24" < 20 lbs 2.7 lbs
S 22" - 28" 20-40 lbs 3.4 lbs
M 26" - 30" 40-60 lbs 4.9 lbs
L 30" - 37" 60-80 lbs 6.4 lbs
XL 36" - 41" > 80 lbs 7.9 lbs