Kate Collection Cream Crocheted Dress and Slip

Crocheted Sheer Cream Dress And Slip (two separate pieces) in excellent condition. Size small, inside size tag removed for comfort. Dress has one small speck located on the back bottom side towards the middle of dress (see last photo). I thought it was a stain, but upon examination, I now believe it to be an imperfection in the material. My daughter wore this dress a couple of times and I never even noticed the speck until I was examining it up close for posting on here. Questions welcomed!