Find Your Fit
Size Guide
There's nothing quite like a perfectly fitting bonnet. We size every Briar piece so parents can buy with confidence. Measure once, find your size, and know it will sit just right.
Size by style
Classics
| Size | Circ. |
|---|---|
| 0–3M | 14–15½" |
| 3–6M | 15½–17" |
| 6–12M | 17–18½" |
| 12–18M | 18½–19¼" |
| 18–24M | 19¼–20" |
| 2–4Y | 20–21¼" |
Sunbonnets
| Size | Circ. |
|---|---|
| 0–3M | Up to 15½" |
| 3–6M | Up to 16½" |
| 6–12M | Up to 17½" |
| 12–24M | Up to 18" |
| 2–4Y | Up to 19½" |
Bébé
| Size | Circ. |
|---|---|
| NB | Up to 14¼" |
| 0–3M | Up to 16" |
| 3–6M | Up to 17" |
| 6–12M | Up to 18" |
| 12–24M | Up to 19½" |
Beanies
| Size | Circ. |
|---|---|
| 0–6M | 17" |
| 6–12M | 18" |
| 12–3Y | 19" |
| 3–10Y | 20" |
| Adult | Up to 23" |
How to measure
Finding the right fit starts with one measurement.
Using a soft measuring tape, wrap it around the widest part of your child's head — just above the ears and across the forehead. That number is your head circumference.
No measuring tape? A piece of string works just as well. Measure the string against a ruler afterward.
Fit by style
Classics + Bébé
Sized to fit toward the end of each range.
Our bonnets tend to fit most beautifully toward the end of the age range. A little room at the start means a longer season of wear — and the ties always allow for a custom fit.
Sunbonnets
Wide brim, snug fit at the head.
The sunbonnet body fits similar to our classic styles. The brim should shade generously but never cover the eyes. Wear it forward for full coverage or flip it back for greater visibility.
18–24M shape
Designed for the way faces change.
As toddlers become more active, faces thin and necks elongate. Our 18–24M shape accounts for exactly this. Some children move straight from 12–18M to 2–4Y — both are completely normal.
All styles
Between sizes? There's a simple rule.
If your child is closer to the bottom of a size range, size down. Closer to the top, size up for one more season. The ties do the rest.
Still not sure? Email us at hello@briarbaby.com — we're happy to help you find the right fit.
Ready to find your
perfect bonnet?
Every size, every style, every season. Thoughtfully tailored from newborn through childhood.
Shop Briar Baby