Ok, so, posh AI was so off on its description on this dress by calling it a nightie.🤔NO, posh people, these is a legit dress! lol. It's a very soft white material & I do believe it has never been worn due to the pokey plastic tag hang thing still being in the garments tag. I purchased this adorable from another posher, but she didn't list it as NWTs, so I won't either.😁 The pit-to-pit measurement is in the photos & approximately 16 inches lying flat & there is almost 0 stretch to this fabric. It has adjustable spaghetti straps & a hidden back zipper. There are so many cute things I adore about this dress like the ruffle around the sweetheart bust & the almost teired ruffle that poofs out the hem of this sweet lil dress & when I saw that it was hearts with arrows thru them I was like 😍! lol. I immediately dubbed this my Valentine's Day dress, but unfortunately, I have a slightly too wide waist line to fit into its mildly structured unstretchy bodice.😔 My loss your gain!🤔Well, actually, it's more like my gain caused it to be my loss & benefitted you!😆lol. However you look at it, it's way too cute of a dress to hoard in my closet, so I'm setting her free! Size medium & true to size with no signs of wear or damage. I'm not 100% if it IS nwt, but it sure looks the part!😉lol.💘 Enjoy!😁