purple cap

Brim and bill lengths range from short to wide. Listed values include approximately 2", 2.7", 2.75", 3", 4", and 4.5".

Most listings are one-size-fits-most or use general adult sizing. Provided measurements include an approximate 21"–23" head circumference and specific values such as 22.6"; some listings show circumferences as 22.75 cm and 23 cm—note that the sources mix inches and centimeters.

Several sun hats list UPF 50+ protection. One description specifically notes that UPF 50+ blocks about 98% of UV rays.

Care instructions vary by item. Common directions are: machine wash then line dry or lay flat to dry; hand wash then line dry or lay flat to dry; and for one item, machine wash then tumble dry. Check the specific product label for exact care guidance.

Crown heights vary and listed values include about 3", 4", 4.25", 6", 8", and 9", covering low-profile cap crowns up to taller wide-brim hat crowns.

Breathability features include mesh construction or mesh liners, ventilated designs, breathable fabric panels at the sides or back, and sweat-wicking inner bands on several styles.