Forever 21 Grey Sweater Dress With Open Back

Grey sweater dress from forever 21 with open back. Fits very snuggly, but has a lot of stretch and is a super soft, comfortable material. Bodycon fit. The dress falls to about my knees and I am 5'7. The size is medium, but again super stretchy. I am a size 40 in bust around for reference. Open to offers!