Size Small Old Navy Maternity Bell Sleeve Black Dress. A perfect little black dress for any trimester. This dress would be great for the office, but also as a wedding guest or any other fancy function you might need to wear it to. Preloved in excellent condition. Pet and smoke free home. Offers Welcome. Measurements: Armpit to Armpit: 18.5" Length: 37" Sleeve Length: 7.25"