Little black dress with crochet trim

The tag says it’s a size 5 but I think it’s more like a size 2 as the chest and waist is very tight. It has a side zipper closure and has pockets! Lovely gather on the front skirt and includes the original belt. Short sleeves with plunging neck and back with lace crochet trim. Knee length. I’m 5’5” 125 lbs.