karmalady
oh dear callistemon, too late. You need to re-visit the washing programme, likely it was too warm followed by cold. Many fibres will felt ie tighten up and shrink at 40, which is considered cool
If it is good quality fibre then why don`t you unpick the jumper and knit it up
No, karmalady I followed the instructions on the label exactly.
It was a bought jumper and DD wore it, shrunk, when she stayed! but now it's going to the ragman. Pity, it was a lovely navy blue Guernsey style sweater. 
I've looked up eucalan as I'd never heard of it.
I used Woolite.
And I have enough yarn to knit/crochet to keep me going for years.
Daren't look at yarn ......