Fit  When selecting your size for the Euro top, simply use your cup size measurement when referencing the size guide since the back is fully adjustable Medium Support Cups Slide For An Adjustable Fit  Fully Adjustable  Ties At Neck And Back Recommend Sizing Up One Size Style Features Double Halter Straps Triangle Top Removable Bow Detail Style Tip: Criss-Cross The Strings For A Totally Different Look!