Have PFDs of the Proper Size
PFDs must be of the proper size for the intended wearer.
Always read the label of a wearable PFD to make sure it is the right size based on the person's weight and chest size. It's especially important to check that a child's wearable PFD fits snugly. Test the fit by picking the child up by the shoulders of the PFD and checking that his or her chin and ears do not slip through the PFD.