Sparkle underwire bikini top

Love the sparkle material and the design. This top definitely runs small, on me at least. I'm 34B 130lbs 5'6". I'm usually xs in jcrew s in swim. I have always purchased 34B when bra sizes are availble in swim. This top was tight in the around ribcage band (on last hook )and also tight in the adjustable over the shoulder straps. I can wear it but if you're between sizes I would recommend sizing up.