A life jacket’s tag does not always settle whether it is your size. Astral and NRS publish different charts, and a 38-inch chest lands in three different labels across them (Astral and NRS charts, checked 2026).
So a size chart from one brand does not carry over to another. Adults are sized on chest circumference, with weight as a second measure on graded models, and children on weight (Astral, NRS, REI, Stohlquist and Stearns charts, checked 2026).
So this page shows both charts side by side, and you can see exactly where they disagree.
The Coast Guard requires a device of appropriate size and fit under 33 CFR 175.21, used according to its label under 33 CFR 175.15(a) (U.S. Coast Guard, verified 2026). The retailers’ published check is to buckle the vest snugly and lift by the shoulders, which is taught for children (REI and BoatUS, checked 2026).
This page summarizes published safety guidance. It is not a substitute for instruction, and conditions on your water may differ. Check the current rules for the state and water you paddle.
The fit checks on this page come from REI and BoatUS (checked 2026). The U.S. Coast Guard requires a personal flotation device of appropriate size and fit under 33 CFR 175.21, and the device must be used according to its label under 33 CFR 175.15(a) (U.S. Coast Guard, verified 2026). Sizing and fit therefore sit inside the carriage rule, not only in comfort (U.S. Coast Guard, verified 2026).
How to read your brand’s chart, pick the right size and confirm the fit before you paddle is below.
Key Takeaways
- The U.S. Coast Guard requires a personal flotation device of appropriate size and fit under 33 CFR 175.21, used according to its label under 33 CFR 175.15(a) (U.S. Coast Guard, verified 2026).
- Adults are sized by chest circumference, with weight as a second measure on graded-sizing models, while children are sized by weight (Astral, NRS, REI, Stohlquist and Stearns charts, checked 2026).
- NRS instructs paddlers to confirm sizing against each brand’s own chart, because “every PFD manufacturer has its own sizing system” (NRS, checked 2026).
- Level 70 adult minimums are banded by wearer weight: 15.7 pounds (lb) over 70 kilograms (kg), 14.6 lb from 60 to 70 kg and 13.5 lb from 40 to 60 kg (Mustang Survival with values from ANSI/CAN/UL 12402-5, 2024).
- A Paddler’s Guide to Safety, from the U.S. Coast Guard Auxiliary and the American Canoe Association, notes that vests are “designed for differences in body types and have specific ones for the female body” (U.S. Coast Guard Auxiliary and American Canoe Association, 2023).
How Adult and Children’s Sizing Works
Adults are sized on chest circumference, with weight a second measure on graded-sizing models; children are sized on weight (Astral, NRS, REI, Stohlquist and Stearns charts, checked 2026).
The under-16 rule is separate and it is federal: inflatable life jackets are not Coast Guard approved for users under 16, so a child wears an inherently buoyant foam vest (Oregon State Marine Board and the U.S. Coast Guard, accessed 2026).
Children’s Weight Classes
REI, Stohlquist and Stearns publish these children’s weight bands (REI, Stohlquist and Stearns, checked 2026):
| Class | Weight Range (lb) | Weight Range (kg) |
|---|---|---|
| Infant | 8 to 30 lb | 3.6 to 13.6 kg |
| Child | 30 to 50 lb | 13.6 to 22.7 kg |
| Youth | 50 to 90 lb | 22.7 to 40.8 kg |
Source: REI, Stohlquist and Stearns published sizing charts, checked 2026.
Those charts guide the purchase, and the band printed on the vest governs its use. 1 The Coast Guard’s 33 CFR 175.15(a) requires each device to be used according to its label, and 33 CFR 175.21 requires a device of appropriate size and fit (U.S. Coast Guard, verified 2026).
Why the Rules Are So Strict
The stakes here are real, and the numbers show it. The U.S. Coast Guard’s Recreational Boating Statistics 2024 records 556 recreational boating deaths (U.S. Coast Guard, Recreational Boating Statistics 2024), which the Coast Guard’s press release of July 1, 2025 calls the fewest in more than 50 years of the program (U.S. Coast Guard, July 1, 2025).
Across all vessel types, 87 percent of drowning victims whose life-jacket use was known were not wearing one, and paddlecraft made up 26 percent of the deaths where the vessel type was known (U.S. Coast Guard, Recreational Boating Statistics 2024).
The label carries the size band and the conditions of use, and the Coast Guard’s rule is that the device is used according to it (U.S. Coast Guard, 33 CFR 175.15(a), verified 2026). Match your measurement to that band before you buy (Astral and NRS charts, checked 2026).
PFD Size Chart Comparison: Astral vs. NRS
Here are Astral’s current chart and NRS’s legacy Type III chart, still published on the Chinook closeout page, side by side; they overlap and disagree (Astral and NRS charts, checked 2026). Measurements below use inches (in) and centimeters (cm).
| Brand | Size Label | Published Chest Range |
|---|---|---|
| Astral | XS | 27 to 31 in (69 to 79 cm) |
| Astral | S/M | 31 to 37 in (79 to 94 cm) |
| Astral | M/L | 38 to 44 in (97 to 112 cm) |
| Astral | L/XL | 45 to 51 in (114 to 130 cm) |
| NRS legacy Chinook | S/M | 33 to 40 in (84 to 102 cm) |
| NRS legacy Chinook | L/XL | 38 to 46 in (97 to 117 cm) |
| NRS legacy Chinook | XXL | 42 to 50 in (107 to 127 cm) |
Source: Astral and NRS published sizing charts, 2026.
Take a chest measurement of 38 inches. Astral places it in M/L, NRS’s legacy Chinook chart puts the same measurement in both S/M and L/XL, and NRS’s graded Ninja lists it inside its XS/M band (Astral and NRS charts, checked 2026).
One chest number, three label outcomes across those charts. That is why the brand’s own printed band is the one to check.
NRS instructs paddlers to confirm sizing with each brand’s chart, stating that “every PFD manufacturer has its own sizing system” (NRS, checked 2026).
Astral’s current chart and NRS’s legacy Chinook chart disagree on sizing, and the two charts are not reconciled or averaged here (Astral and NRS charts, checked 2026). Check the current chart for the model you are buying.
Why Fit Matters to Buoyancy
A paddling vest carries its foam in front and back panels with very little at the sides (NRS, Astral, Kokatat and Stohlquist, checked 2026). 2 The published fit check turns on the same point, and REI and BoatUS publish it for children: a child’s vest that rides up when the child is lifted by the shoulders is too large (REI and BoatUS, checked 2026).
The U.S. Coast Guard puts an adult’s extra buoyancy need at 7 to 12 pounds (31 to 53 N), and the published Type III adult minimum is 15.5 pounds (70 N) (U.S. Coast Guard, 2024).
Buoyancy Changes With Size
Buoyancy also shifts based on the size you choose within the same model. NRS lists the current Ninja at 14.5 pounds in XS/M, 15.75 pounds in M/L and 16.75 pounds in XL/XXL (NRS, checked 2026).
Mustang Survival uses a weight-based system under ANSI/CAN/UL 12402-5, and its Level 70 bands are (Mustang Survival with values from ANSI/CAN/UL 12402-5, 2024):
- 15.7 pounds of buoyancy for paddlers over 70 kilograms
- 14.6 pounds for paddlers between 60 and 70 kilograms
- 13.5 pounds for paddlers between 40 and 60 kilograms
Those bands are the published minimums for the class, whichever maker’s vest carries the label (Mustang Survival with ANSI/CAN/UL 12402-5, 2024). Read the printed band before relying on any figure.
Women’s, Plus-Size, and Graded Sizing Options
NRS, Astral, Kokatat and Stohlquist publish women’s-specific vests shaped for the female torso (checked 2026), and A Paddler’s Guide to Safety, from the U.S. Coast Guard Auxiliary and the American Canoe Association, notes that vests are “designed for differences in body types and have specific ones for the female body” (U.S. Coast Guard Auxiliary and American Canoe Association, 2023).
The charts themselves disagree on where a given chest measurement lands, which is the reason to read the brand’s own band (Astral and NRS charts, checked 2026).
NRS offers plus and larger sizes extending to about 56 inches (142 cm) of chest circumference in XL and XXL, and its published charts run 33 to 56 inches (84 to 142 cm) (NRS, checked 2026).
Graded Sizing and Youth Vests
NRS’s Every Body Design models, the Chinook OS and the Vector, use graded sizing in place of separate men’s and women’s versions (NRS, checked 2026). Youth foam vests are sized by weight rather than chest alone (REI, Stohlquist and Stearns, checked 2026).
NRS’s published sizing charts give both chest and weight for its graded models, so read both numbers before buying (NRS, checked 2026).
How a PFD Should Fit: The Shoulder-Lift Test
Fit sits inside the carriage rule: 33 CFR 175.21 requires a device of appropriate size and fit (U.S. Coast Guard, verified 2026).
For children, REI and BoatUS teach the same test: buckle the vest snugly, then lift the child by the PFD shoulders (REI and BoatUS, checked 2026).
A correctly fitted vest “will not slip above the child’s chin and ears”, and a vest should not be bought oversized “to grow into” (REI and BoatUS, checked 2026).
Federal law requires children under 13 to wear an approved PFD when a vessel is underway on federal waters, and states may set their own wider rules (U.S. Coast Guard’s 2023 boater’s guide, verified 2026).
Running the Published Test
REI and BoatUS publish this check for children (REI and BoatUS, checked 2026). No admitted source publishes an adult version, so the steps below are the child test as those two write it:
- Buckle the child’s life jacket snugly around the torso.
- Lift the child by the PFD shoulders.
- Watch the vest. It should stay in place rather than riding up toward the chin or slipping off at the sides. 3
- If it slips up past the chin, it is too large (REI and BoatUS, checked 2026).
The test speaks to fit. Whether the device is approved and serviceable is a separate check, against its label and 33 CFR 175.23 (U.S. Coast Guard, verified 2026).
When Your Vest Has Worn Out
Your paddling vest loses its grip over time. Kevin Mulligan from Astral, quoted in Paddling Magazine, explains that new foam starts out “firm and stiff” and breaks down over time into something “softer and more pliable” (2026).
Matt Porter of Kokatat says a vest that suddenly feels barely there may have shrunken foam that lacks adequate buoyancy, with folds, lumpiness and foam that bends easily as the signs (Kokatat, checked 2026).
Signs to Look For
The signs Kokatat names (Kokatat, checked 2026):
- Foam that folds under light pressure, a sign of softening
- Lumpiness at the front panel seams, a sign of internal breakdown
Whether a device must be replaced is settled by the Coast Guard’s unserviceable rule below rather than by these signs alone (U.S. Coast Guard, 33 CFR 175.23, verified 2026).
The Coast Guard’s Unserviceable Rule
Under 33 CFR 175.23 a device is unserviceable if webbing is ripped, torn or detached, if hardware is broken or corroded, or if the foam has rips, tears or open seams that let buoyant material escape (U.S. Coast Guard, verified 2026).
An unserviceable device does not meet the carriage requirement, whatever it is adjusted to (U.S. Coast Guard, verified 2026).
Your Next Steps
To put this together, measure your chest, then find that measurement on the brand’s own chart rather than a general guide, since “every PFD manufacturer has its own sizing system” (NRS, checked 2026).
Once the vest arrives, buckle all straps snugly. For a child’s vest, REI’s and BoatUS’s published check is the shoulder lift: a correctly fitted vest does not slip up past the chin (REI and BoatUS, checked 2026).
The Coast Guard’s own requirement is a device of appropriate size and fit under 33 CFR 175.21, used according to its label (U.S. Coast Guard, verified 2026).
For more help, the accessories guide shows the full collection, the choosing page walks through picking the right vest for your paddling style, and the children’s page covers infant, child and youth sizing in foam vests.
The types-and-levels page explains how the buoyancy classes are published and what each level means.