The hat is suitable for toddler girls of 2-3 years with head circumference of 47cm (18.5”) - 51cm (20.1”). This hat is good stretching and quite thick. That’s why it’s suitable for many kids of this age.

It’s a step-by-step pattern, a VERY detailed step-by-step tutorial with plenty of pictures.
There are so many photos that everything will be clear. You need to know only how to make basic crochet elemens such as sc, dc, half dc, trc, chain st. and slip stitch.