Can anyone advise on which model of tee to get?
Mercers don't work for me, the Small isn't broad enough in the shoulders (and does a weird hourglass figure thing), and although the medium just about fits, it's way too long.
With or without a slutty neck is fine, though I never a wear a tee that has one just on it's own, only use for layering. Trying on is a bit of a pain in the UK, went into HN today and they literally had just two Mercers, in two sizes.
maybe try a classic crew in co-mix in a medium? the co mix generally fits tighter and shorter and drapes differently than the regular tees