Sherri Hill 56917 comes in the following colors: Lilac. $998 is the Formal Approach best price guarantee for style 56917 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 56917 is available in the following sizes: 000,00,0,2,4,6,8,10,12,14,16,18.