Gap tops - what do their sizes actually mean?

[PrimulaVeris]

I have a rare opportunity to pop into a Gap store next week. I recall that their tops & shirts are sizes XS/S/M/L etc which I find meaningless

Anyone know how this translates into standard English sizes 10/12/14 etc? Thanks in advance

Message withdrawn

wot hana said

Ohhh many thanks everyone - damn I'm on the small/med borderline by looks of it!