Round or Square Face
YES: straight brim, large brim, low crown, fedora
NO: deep/rolled short brims, too small hat size
YES: flat crown gambler/Western, low crown, flat wide brim
NO: high crown hats; rolled brim hats close to the face
A hat should be no wider than the width of your shoulders. Broad shoulders...wide brim hat; narrow shoulders...short brim hat.
A tall or larger lady can wear a lot of hat. A petite lady will find a smaller/lower crown hat more flattering. This refers to the overall size of the hat not just the inside diameter. I specialize in fitting ladies at either extreme of the scale: Extra small to XL head sizes and tall to petite women.