NWT Kiniki Women's Tan-Through Bikini Thong Swimwear in Tropic and Size 8 UK It's size 8 UK which is size 4 US. Please refer to the sizing chart!! Our patented Tan Through swimwear is a unique advancement in fabric technology that helps the wearer achieve an all over sun tan and minimise tan lines by letting the suns UV tanning rays to pass through the swimwear fabric. Quite simply, our unique patented Tan Through swimwear fabric contains millions of tiny square & diamond shaped holes allowing the suns tanning rays to pass through. While we know holes in fabric isn't exactly rocket science, with holes comes transparency and this is where the magic happens! To counter the transparency we design special prints that confuse the eye and camouflage the skin beneath making any transparency issues melt away like butter in the sunshine you will be lying in!