If you got a c in between the two you would have a 16,13, 11 quiver. I guess if you are weighing in around 16-18 stone that would be ok. If you are smaller then I would suggest your 11m is not set up right . Good rule of thumb is that biggest kite size approx the same as your weight in stone. Anything bigger overpowers you too quick and will be slower than you need.