What do you think of this dress?

Let me start off by saying I'm actually a very skinny girl. My waist is 22 inch already (which is small in number), but since I barely have boobs (A cup) and my hips aren't the widest, in proportion it doesn't look like it is small. This makes me feel like my waist isn't small enough to look "snatched"

The model wearing this dress from the website has a really nice hourglass body that I wish I had but I don't think I can suddenly have bigger ass or boobs with my body type?

Thing is I don't even know if this dress compliments my body type. Or are all those worries are all in my head and I criticize myself too hard? Honest answer please!

This is the model: