How to take garment measurements of hats:
Take a hat you already own. Using a soft measuring tape, take the following measurement:
Total Circumference: : Using a soft measuring tape, follow the curve of the hat around its complete circumference (i.e all around the hat). Make sure you hold the measuring tape closely against the hat.
Hat measurements are very precise. There is only a difference of 1.5cm between each size, so it’s important to be careful in taking your hat measurement.