Row one: (ws) Slip 1, P12, P2 tog, P1, turn back to rs.
You will have 8 stitches unworked.
Row one: (ws) Slip 1, P14, P2 tog, P1, turn back to rs.
You will have 10 stitches unworked.
You have to choose which size sock you are making, and depending on which size you have chosen, you will work to the numbers in either the pink column or the purple column.
Hope that helps. :D Come back if you need more help.