How to Choose a Baby Straw Hat? | Fit, Sun Safety & First Checks

Choose a baby straw hat that fits snugly without leaving marks, blocks sun with a wide brim and UPF 50+ fabric, and avoids long ties or loose decorations.

Picking a baby straw hat gets tricky because not every straw hat is actually sun-safe. The weave density, brim width, and any stated UPF rating matter more than the style, so a hat that looks great can still leave your baby’s ears and neck exposed. Start with the measurement, then check the brim, the fabric, and the hazards, and you will land on the right one.

Below is the short process: measure, match, test, and inspect. There is also a table of size ranges so age labels stop being a guessing game.

Start With Head Size, Not Age

Baby head sizes vary widely at the same age, so the only reliable starting point is a soft tape measure. Wrap it around the widest part of the head, just above the eyebrows and ears, and write down that number in centimeters.

Compare that measurement to the manufacturer’s size chart, not the age range on the tag. Babylist and The Bump both show that a “6–12 months” label can span 44–46 cm, while another guide puts a 3-month-old at 40–42 cm. Age labels overlap too much to trust.

When a hat sits between two sizes, go slightly larger for easier wear, but keep it snug enough to stay on during movement. A hat that slips down over the eyes is both annoying and a safety issue.

What A Safe Baby Straw Hat Looks Like

A safe baby straw hat covers what the sun damages most: the face, ears, and the back of the neck. For babies under 6 months, sun-hat guides recommend neck flaps and full ear coverage because their skin is especially sensitive. Multiple sources recommend a brim around 2–3 inches for young children, with 3 inches or more for stronger coverage.

Beyond the brim, check these four things before buying:

• UPF rating: For outdoor sun use, prioritize UPF 50+ fabric or a clearly stated rating. A hat without one may still block sun, but you cannot verify how much.
• Structured brim: A stiff or structured brim holds its shape instead of flopping into your baby’s eyes, which keeps coverage working while they turn their head.
• Breathable material: Soft, breathable fibers like organic cotton, bamboo, or merino wool beat stiff or plastic-like waterproof materials that trap heat.
• Breakaway chin strap: A chin strap helps keep the hat on in wind, but only if it is designed to release safely under tension. Skip long ties entirely.

Sizing Check: Newborn To Toddler Head Circumference

Here are the typical head circumference ranges from published baby-hat guides. Use them as a starting point for comparing your measured number, then confirm against the specific brand’s chart.

These ranges are guides, not rules. If your baby’s measurement falls between two sizes, use the larger size and check how snugly it sits rather than getting the smaller one that could leave marks or compress the head.

Final Fit Test Before You Keep It

The real test happens with the hat on your baby’s head, not in the packaging. Put it on and check that it stays centered and clear of the face, nose, and mouth during movement.

Run through this quick final check:

• No red marks on the forehead or behind the ears after a few minutes of wear.
• No loose beads, pom-poms, buttons, or sequins that can detach and become a choking hazard.
• No rough internal seams, loose threads, or tags that could irritate sensitive skin.

Wash the hat before first use if the care label allows, especially for newborns or sensitive skin. And remember: a straw hat is for outdoor wear. For sleep or indoor naps, remove it to reduce overheating risk.

Once you have the sizing and safety checks down, the fun part is picking the style. Our tested roundup of the best baby straw hats covers the top options that pass these checks for different budgets and activities.