Was from Chewy. to figure out if it will fit your dog, My Chihuahua is 9 lbs. But the vest has lots of adjustments to make it larger.
FRISCO SHARK LIFE JACKET: For a correct fit, measure your dog's body length and chest in inches.
Back Length: Measure from the base of the neck to the start of the tail.
Chest: Measure just behind the front legs at the fullest part.
X-Small: for toy dogs:
back length 10-12 Inches, chest 11-15 Inches, max supported buoyant weight 15 lbs
Note: We sold our boat so he doesn't need the life jacket anymore.
He only wore it twice.