Bought the Essential Cheeky Underwear. According to their size chart "Large" is my size, and it's also the same size that I use for seamless underwear from other brands, like Uniqlo, H&M and more, so that's what I ordered. The underwear is EXTREMELY small. I'd need to order AT LEAST two sizes up to be able to wear it comfortably. They don't accept returns or exchanges for the item, so I'm stuck with (expensive) underwear that I'm never going to use unless I lose 10 kilos. The whole point of buying seamless underwear is that it's comfortable and that it doesn't show when wearing clothes. Knix seamless underwear fulfills neither. Very disappointed and a big waste of money, as I ordered the correct size according to their size chart. They should at least offer exchange since their own size chart is not reliable. Never again.