If you are skeptical or reserved about buying the Montana dress, BUY IT! You won’t regret it! I was the same and it took me 3 weeks to finally pull the trigger. My only regret was not buying this dress sooner. Other reviews say the material of this dress is thicker than expected, which I agree but it’s not thick like the material on a denim jacket. I think most people were expecting a chambray like fabric but no, the denim on this dress is soft and worn in with a little weight, like well worn jeans.
I also agree this dress would be too hot to wear in hotter weather, but it’s perfect for low 70s and below, especially when there’s a breeze.
I originally purchased a Small, but returned it for a XS. For reference, I’m 5’3” and am typically a medium/large. I take a 28” in seam for pants and my bust is about 39”. The XS was perfect for a fitted but still slightly loose look. I had about an inch of extra space around the bust and about 3-4” around the tummy. The Small was fine, but I thought there was still a little too much fabric for my petite frame. The dress hits about 1-2” above my ankle.