How do I know which hat is right for me?
It depends on your head size and intended use. Check our Size Chart to find your fit, and browse our Shop to compare styles. Still not sure? Contact us and we'll help you choose.
June 2026
October 2024
Are Nammu swim hats available in different sizes?
Yes! Nammu hats come in XS, S, One Size, and XL to fit kids and adults of all head sizes. Check our Size Chart to find your perfect fit.
October 2020
What sizes do Nammu hats and shirts come in?
Swim Hats Chart Size Circumference + XS 17.5"/44.5cm Best fit for babies and toddlers for a snug fit S 20"/49cm Only available in the revisable hats One Size 21.5"/54.6cm XL 23.5"/59.7cm Best fit for above-average size adult head Sizing Tips To ensure you get the right
January 2016
Are Nammu hats only for children?
Not at all! Nammu hats are designed for all ages. From toddlers to adults, our hats offer UPF 50+ sun protection and a comfortable fit for any water activity.