Ordered dress for myself, but found I was allergic to the material. My niece decided to "take over" the dress, but needed a larger size, we returned for a larger size (she is typically a size 14), we ordered a size 18 and it was too small through the bust, so we not only had to pay the restocking for the one I was allergic to, but also had to pay an extra $50 to have it altered.
I'm sorry that you were allergic to the material of the dress Bridget :( I believe when we spoke on the phone that the size 18 for your niece was going to be tight, which we both knew in advance. Unfortunately the largest size available in the gold color was size 18 (44" bust, 36" waist). Otherwise, of course the size 20 would have worked better for your niece.