Jovani 23320 prom dresses come in the following colors: Print. $600 is the Formal Approach best price guarantee for style 23320 by Jovani. Shop with confidence, Formal Approach is an authorized Jovani prom dress store. We only offer authentic designer prom dresses. Jovani 23320 is available in the following sizes: 00, 0, 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24.