Use a flexible measuring tape and measure around the widest part of the head.
Just send me the exact measurement, and I will make the hat so that it will fit perfectly. The hat diameter should be about 1/2 to 1 inch smaller than the head measurement, to ensure a comfortably snug fit.
Also the type of yarn depends on how big the hat should be. Regular yarn is stretchier than baby yarn, so a hat made with regular yarn might appear to be a little smaller than it should be. But don't worry. :)
|Mens||Approx. 23" around|
|Womens||Approx. 21.5" around|
|Large Child||Approx. 20" around|
|Medium Child||Approx. 18" around|
|Small Child||Approx. 16" around|
|Newborn||Approx. 12" around|
|Preemie||Approx. 11.5" around|