NWT Sir Maxe Long Sleeve DRESS in BLACK SMALL 2

NWT (new with tags) I’m OBSESSED with this dress but I didn’t end up wearing it to an event and now it doesn’t fit. 🤦‍♀️ The back of the dress zips all the way up but I didn’t want to try with it being a little snug. Fits like a US SIZE 2 but this brand labels it as a “1” out of “0 1 2 3”. The slit is just on the left leg. There is a tiny thread line on the back right leg panel.