Ruebelle Halterneck Asymmetric Midi Dress in Mocca 43 Children Jumping Over Training Hurdles Athletics Royalty Free Photos. The Ruebelle Midi Dress features halterneck straps and a v neckline, an open back, an asymmetric hem and a silver clasp belt at the centre. It comes in a rich mocca brown colour, perfect for the warmer nights. MODEL WEARS SIZE: EXTRA SMALL MODEL HEIGHT: 5'7 FABRIC CONTENT: 94% POLYESTER 6% ELASTANE