Sherri Hill 56639 comes in the following colors: Black. $1150 is the Formal Approach best price guarantee for style 56639 by Sherri Hill. Shop with confidence, Formal Approach is an authorized Sherri Hill prom dress store. We only offer authentic designer prom dresses. Sherri Hill 56639 is available in the following sizes: 000, 00, 0, 2, 4, 6, 8, 10, 12, 14, 16, 18.