Eliza J floor length halter dress

Fully lined, floor length, halter neck, built in bra, elastic back, side zip. ***tag says size 8, I had it professionally altered to a size 4*** (I have other Eliza J dresses that are sz 4 this has same measurements.) I am 5"4', 125 lbs. Bra cups are a little big for me (I'm an A).