Rachel Allan 70863 taffeta prom dresses are offered in Black, Candy Pink, Emerald, Red, Royal. $498 is the Formal Approach best price guarantee for style 70863 by Rachel Allan. Shop with confidence, Formal Approach is an authorized Rachel Allan prom dress store. Rachel Allan 70863 is offered in the following sizes: 00, 0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24.