I am a size 10 and 34DD and at first I didn't think I'd be able to get in this dress it looked so tiny. But it really stretches and although it's absolutely skin tight and straining over my bust, it's very comfortable. The lattice sides are very baring and it's short, although not quite as short as the pictures. Do you wear anything underneath? Absolutely not! The whole point of this dress is that everyone can see from the cut-out sides that you are commando.....Could it be worn out? Well I can think of a few clubs where it would be possible. Or maybe Amsterdam where you can be very skimpy . However, the bust section has cut outs and is very sheer in places. I have tried adjusting myself in it but it has been deliberately designed so there is no way of hiding my nipples. So it would mean being virtually topless as well as no undies! I would want a bodyguard!! However, with killer heels it would be quite something.