Use the product-specific size guide whenever possible. As a general guide, S/M is 52 cm and usually suits 2Y-3Y, M/L is 54 cm and usually suits 3Y-6Y, and L/XL is 56 cm and usually suits 7Y to teen. Head sizes vary, so measuring is the most reliable way to find the right fit.

Wrap a soft tape measure around the widest part of the head, about 2.5 cm above the eyebrows, where the hat will sit. Keep the tape comfortably snug rather than tight. If the measurement falls between two sizes, choose the larger size for comfort.

No. Oobi swim hats specifically labelled UPF50+ carry that rating. Our cotton ponytail hats and baby sun hats are designed with practical wide brims for coverage, but you should check each product page for its exact sun-protection claim. A hat works best as part of a complete sun-safe routine.

Our Chloe ponytail hats have an adjustable chin strap and toggle to help them stay put during active play. Baby hats use adjustable Velcro ties. Reversible bucket hats do not have a toggle so they can be worn on either side. Check the individual product page for the features of your chosen style.

A discreet opening at the back lets a ponytail sit comfortably without pushing the hat out of place. No ponytail today? No problem. The opening is neatly finished and subtle when it is not being used.

Yes, Oobi fabric hats can be machine washed. Follow the care instructions on the individual product, and blot sunscreen or makeup marks first with a damp sponge and a little gentle liquid detergent. Then the hat is ready for its next starring role.