I don't use AWG wire. I buy metric wire that is displayed with the stranding, i.e. 16/0.2 is a wire made up from 16 individual 0.2mm diameter strands. A 24/0.2 wire is made up from 24 0.2mm strands.
For reference 16/0.2 is equivalent to 20AWG, 24/0.2 is equivalent to 18AWG.
There is a handy...