He said in my case as it was too wide and too long and I quote. soak the body of the Gansey upto the armpits in a bath,sink etc,.of COLD WATER , remove and SQUEEZE SQUEEEEEZ E out as much water by hand as you can.
then lay it flat on a towel and leave to dry in that position,
dont pull it around and it will 'come in' . in both the length and the width. I have found through an online search that the best way to squeeze out the water is not to wring the jumper but to wrap it in a towel and compress the towel to remove the water, wringing is apparently bad.