O'Neill Life Vest Size Chart & Fit Guide

O’Neill Life Vest Size Chart & Fit Guide

Find your fit with O’Neill life jacket and competition vest sizing. Choose a category below to view chest measurements or kids’ weight ranges. Sizing can vary by style, so check the vest’s specific fit and approval label.

Men’s Vests

Men’s CGA Life Vests
Size Chest circumference
XS 32.5–35 in
S 35–37.5 in
M 37.5–40 in
L 40–42.5 in
XL 42–45 in
XXL 45–47.5 in
3XL 47.5–50 in

CGA sizing may vary between styles. Confirm measurements for the specific vest before ordering.

Men’s Competition Vests
Size Chest circumference
XS 35–38 in
S 37–40 in
M 38–42 in
L 40–44 in
XL 43–47 in
XXL 46–50 in
3XL 48–52 in

Competition vests are not USCG-approved life jackets.

Women’s Vests

Women’s CGA Life Vests
Size Chest circumference
4 (XS) 30–33 in
6 (S) 33–36 in
8 (M) 36–39 in
10 (L) 39–42 in
12 (XL) 42–45 in

CGA sizing may vary between styles. Confirm measurements for the specific vest before ordering.

Women’s Competition Vests
Size Chest circumference
4 30–33 in
6 31–34 in
8 32–35 in
10 34–37 in
12 35–38 in
14 37–40 in
16 38–41 in

Competition vests are not USCG-approved life jackets.

Kids’ Life Jackets

Infant, Child, Youth & Teen
Size Weight
Infant Up to 30 lb
Child 30–50 lb
Youth 50–90 lb
Teen 75–125 lb

Use the weight range and the approval label on the specific life jacket. Weight categories overlap.

How to Measure & Choose Your Fit

Chest: Measure around the fullest part of your chest, keeping the tape level and comfortably snug. Compare your measurement with the chart for your vest style.

Kids: Start with the child’s current weight and confirm the weight rating printed on the jacket. Check that the vest fits securely and cannot ride up excessively.

Safety: CGA/USCG-approved life jackets and non-approved competition or impact vests are not interchangeable. Always check the product label and follow applicable boating requirements.