How should a hat fit?
Your hat should fit snug, not tight, and it should sit level across your forehead, with approximately an inch (2.5-cm) above your eyebrows and a finger width above your ears.
What Hat will I look best In?
As a start we suggest that the crown of your hat is the same height (brim to top of crown) as your face (brim to bottom of chin) and the brim width be proportional to your face width.
People of average to large body types can wear 3 1/2" to 4" brims while smaller body types should consider wearing hats with brims of 3 " to 3 1/2". However, reshaping wide brim upwards can effectively narrow any hat's visual width.
What if my hat is a little big but the smaller size is too small. Is there a way to make my hat fit snugger?
You can try using a 1" to 2" length of foam or insulation tape at the "4 corners" (forehead, back of head, left ear, right ear) of your head or fold some newspaper. The foam tape works much better than paper.