How To Tell Your Hat Size. This is the traditional way that you can use at home to find your hat size, but it's much easier to use the head measuring device because it already has the inches printed on the tape measure. One size fits most is no longer the case.
Fitting for 'hard hats' for those wanting a ‘hard hat’ (cokes, bowlers, and top hats), we advise you to visit lock & co. 17 inches (43 cm) hat height: To find your hat size, take your ruler measurement and find the corresponding size on the chart.
Determine the shape of your head.
9 5/16 inches or 23.5 cm. To find your hat size, take your ruler measurement and find the corresponding size on the chart. The measurement needs to be from the widest part of your head. An average head size for men is size 7 3 ⁄ 8 (using u.s.