The basic dc crown can be used for the beginning of many hat designs.
The measurements given are an approximate as many yarns will differ from brand to brand.
I am using an AU 8 ply yarn (US 4 ply) and a 4.00mm hook (US G/6)
The crochet terms I use are US
I will be giving instructions for a small adult and medium to large adult, both reflecting woman’s sizes.