horse belt from Jigsaw (actually I think it's a side effect of reading too much about Luella's horse riding obsession in her Guide to English Style).
It's a vintage-inspired stretch built with resin horse's heads forming the buckle. Though it costs £45 I think its use as a finishing flourish for lots of different outfits means you'd get your money's worth out of it. Personally, I'd team this up with a pair of flat boots for a touch of equestrian elegance (horse not included). Simple, rosette winning style.