Panache lingerie and swimwear use UK underband and cup sizing. Please use this size chart to convert to international sizing. 
 
Features and Benefits
Tankini top
Non-padded
Underwired
Flattering neckline
Pull-on style
Offers good coverage of the stomach
Tie sides for adjustable coverage on the sides
Twist front detail
Adjustable straps
Vibrant print
Matching swimwear is also available
Composition: 80% Polyamide | 20% Elastane
Composition: Inner Powernet: 87% Polyamide | 13% Elastane