Would enlarge/reduce work on a golem?

[holywhippet]

Golem's have a trait called immutable form which prevents any magic which would change it's form from working on it. So polymorph won't work on them. But what about enlarge/reduce? I'm not not sure if that changes it's form so much as it changes it's size.

[Sigreid]

Immutable form would prevent enlarge/reduce at my table.

[Chronos]

Size is one aspect of form. Golems can't grow a tail, they can't become fuzzy or scaly, they can't change their number of limbs, and they can't grow or shrink.