Tørm (Torm Cycling). Nice, and not pricey

am debating what size to go for. given careful washing (low heat i presume is high wool content) could i expect a torm jersey to:

a) stretch slightly over time
b) shrink a little after a few washes
c) not change at all

?

Low temperature & low agitation washing should keep you at c) for a while.

Wool shrinks as the cuticles in the fibres rub against each other, catching and holding on to each other, in the same way that felt is made. This process is exacerbated in hot water, and with more movement.

Unless you hand wash each and every time, wool is going to shrink & felt eventually.