How are hat sizes determined? Use our simple measuring tape method to ensure that you find the ideal hat size. Your perfect hat deserves the perfect fit.
Having followed our hat measurement guide you are all set to compare your measurement with the hat sizing chart below to work out what size hat you need. Hat sizing is the key to a perfect fit and being able to wear the hat you love with confidence.
Hat sizes are often measured in one of three ways:
The imperial system is used to measure head diameter in inches, which normally ranges between 6.5 and 8.
North Americans use the imperial system, although their sizes are an eighth of an inch larger.
European/Metric: Uses the metric system to measure head circumference in centimetres, which normally range from 53 to 65.
At Lock & Co., hat sizes range from small/55 cm to xx-large/64 cm.