How to measure your head and decide which size to choose:
You can use a tape measure (or a length of string that you can then measure) to determine the length. Place the string or tape around your head just above your ear, across the mid-forehead, completely circling your head. Hold the tape firmly, but not too tightly. You need to measure your head exactly where the hat will sit. If your measurement falls between sizes, we recommend you choose the next largest size.
Size guide for the Suffolk, Brantham, Chelsworth, Oxley, Orford, Aldeburgh and Hemley Collections:
Size guide for the Thurlow Trilby Collection: