I have received a hat with brim under 3" inches and sides are much less.
The description claims the brim is 4" wide around. The app has even 4.7"wide. In section- have a question search for answers, if you write BRIM, buyers do not mentions that in their  reviews!?. Maybe all 14 reviews are not real, because brim is major question to be  asked, and no reviews have that!? and no questions asked neigher!? I have not opened the hat, and very frustrated with misleading descriptions and reviews.