These Youth Life Vests tend to run small. If your child is near the top of a range, consider ordering the next larger size.
These are the Stearns 3004 USCG Approved Type III PFD for youths.
Features:

Durable Crosstech™ flotation foam

Three adjustable safety belts

3004 has adjustable leg strap

Acceptable for personal watercraft, waterskiing, or similar towed uses

Resources:

Image(s):    stearns 3004