Fantasie lingerie and swimwear use UK underband and cup sizing.   Please use this size chart to convert to international sizing.
 
Gathered cups flatters all bust shapes
Fuller coverage cups with a concealed side sling provide a forward profile
Powernet lined wings offer support and anchorage
Fixed and fully adjustable shoulder straps 
Metallic gold apex ring detail that won't get hot in the sun
 
Get the Matching Set – Silhouette Island Mid-Rise Swim Brief