Rachel Allan 70866 stretch tulle, beading, mirrors prom dresses are offered in Aqua Silver, Tangerine Gold. $598 is the Formal Approach best price guarantee for style 70866 by Rachel Allan. Shop with confidence, Formal Approach is an authorized Rachel Allan prom dress store. Rachel Allan 70866 is offered in the following sizes: 00, 0, 2, 4, 6, 8, 10, 12.