Chantelle Opera Demi Bra. Chantelle's opera line is the perfect choice whether you're going to the opera or not! For an elegant and luxurious feel, choose this classic Chantelle bra with gorgeous lace detailing and a fantastic comfort fit. This bra has half size cups which lift and shape the bust for a great fit for a medium sized bust. Featuring adjustable shoulder straps and classic back fastening. Pair with a matching pair of briefs from the Opera collection.