Rachel Allan 70792 stretch taffeta prom dresses are offered in Aqua, Black, Watermelon, Yellow. $538 is the Formal Approach best price guarantee for style 70792 by Rachel Allan. Shop with confidence, Formal Approach is an authorized Rachel Allan prom dress store. Rachel Allan 70792 is offered in the following sizes: 00, 0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20.