I have no problem zipping the other City Chic size 18 dresses. This particular dress would not zip up at the upper back. It got past the waist with no problem but the cut of the dress gets more narrow at the top. I don't consider myself to have broad shoulders and am puzzled by how tight the dress is on the upper back. As for the design of the dress, it is very flattering and the ruffle hides belly inspections. Overall, the dress is beautiful once you get the sizing right.