Yes, numbers in parentheses refer to the different sizes. So you would - K5M, * K1C, k7, repeat to to last 6 sts, then k1C, K5M. It may help if you circle or highlight the numbers for your size to keep you on track. You'll notice on the XL there's a 'K 0' on some of the instructions. If you run across that in your size, you just skip that and go on to the next instruction.
sue- knitting heretic