Ripped the size S I had started last year - looked huge - and started over in XS. Good decision, as only some scraps left when finished. Weighed yarn regularly during sleeves to be on the safe side. (Knitting in light fingering must have eaten more length than normal fingering, plus wanted long sleeves with no decreases.) Soaked in the tub to get the crinkly parts from ripped yarn even - steam blocking was not enough.

Extremely happy with the result!