MAYFASEYWomen's Flare Chiffon Sleeve High Split Formal Evening Gown Maxi Dress with Cape Black L

I'm 5'3, 175 lbs. What size should I get?

Is this machine washable? I purchased in white and it arrived dirty.

does this dress have a liner?

Bought this dress got the largest size you had and the dress dont fit right so how do i returm the dress for a refund.