Got the JonesWares tank. Excellent service.

Fit notes: It's as long as the discontinued Ibex tank, but the arm holes are bigger. I think Medium is definitely the right size for me, but as compared to the small Ibex tank, it's bigger in the shoulders. So overall it fits looser across the shoulder area.

I'd shave maybe an inch off the measurements in their size chart. Their size chart puts me smack in the middle of Medium; in actuality I'd say I'm on the line (as with most brands ).