This pattern can be easily adapted to any other yarn and size, but be sure to make a swatch and measure the Rib pattern slightly stretched to calculate how much you will need for your circumference.

Erretra:I have been made aware of an error/ommission in my pattern:

In Row 5 it should read as follows:
Row 5: rem m, s1, work 3 sts, repl m, work in pattern to next marker, turn work