Self-Portrait Tiered Midi Dress size 6 but really size 2 or 4

Reposhing this item I purchased from @mbunnell. I tried out a similar (US size 4) Self Portrait dress in store and it was too small. So I figured, alright I’ll buy this size 6. Somehow this is even smaller than the one I tried on. So I’m listing this as a size 2/4. Questions? Leave a comment below!