I bought this recently and love it:
www.cosstores.com/Shop/Women/Knitwear/Wide_roll-neck_jumper/46889-3301796.1#c-85342
In fact I love it do much I bought it in black today.
Anyway I very gently washed in on the delicate cycle, 30degree wash, 30 mins, very low revs, with a drop of woo lite, with my other tops and it has come out half the size it went in!! I'm raging. It says machine washable on delicate cycle on the website. Is there anything can be done to salvage it? I have done my best to stretch it out but it's really f@cked I think. Have I comeback with cos? I'm going to hand wash the black one when it needs washing. I hate hand washing!