Find the place you want your hat to sit. Most commonly people prefer about one inch above the eyebrows and about a half inch above the ears. It can different based on each persons preference on where they want their hat to sit. Using a string or soft measuring tape measure that distance and then triple check to make sure.
HOW YOU MEASURE UP
Using a string or soft measuring tape, measure around your head about one inch above your ears or where you want your hat to sit.
Keep the string or tape tight but not too tight.
Double or triple check.
A little off goes a long way to a hat not fitting.
Now consult the chart.
HOW TO FIND YOUR HAT SIZE