Rachel Allan 70638 scuba, chiffon, stone beading prom dresses are offered in Black, White. $678 is the Formal Approach best price guarantee for style 70638 by Rachel Allan. Shop with confidence, Formal Approach is an authorized Rachel Allan prom dress store. Rachel Allan 70638 is offered in the following sizes: 00, 0, 2, 4, 6, 8, 10, 12.