I'm 36.5" around the bust (with bra on).
I'm 35" around the gut measured on belly button (not quite my thickest part)
I'm about 20" across the back of the shoulders.

It has a bit more room for someone with a bigger chest. But anything much smaller may start to puff open the arm holes.

I would describe it as snug around the middle, form fitting but not restrictive. It doesn't flare out - stays pretty snug down to the hips. It is long. (+10!)

As for the waistband: it's a silicone waistband that really grips. I don't like elasticized waistbands as it is, having the silicone there with it really grippy is not for me.

Let me know if there are any other questions! ;-)