Rachel Allan 70871 taffeta prom dresses are offered in Aqua, Candy Pink, Lilac, Red. $378 is the Formal Approach best price guarantee for style 70871 by Rachel Allan. Shop with confidence, Formal Approach is an authorized Rachel Allan prom dress store. Rachel Allan 70871 is offered in the following sizes: 00, 0, 2, 4, 6, 8, 10, 12.