as an average teenager who likes oversized clothing, (just for reference i am ~5’9 and ~135–145 lbs.) i normally only go one to two sizes bigger. i do wear both men’s and women’s clothing, and with men’s i tend to go up one size, but with women’s (usually being cut for a smaller frame) i size up two sizes. i feel this ratio gives me the Avatar Jake Sully The Way Of Water Mug so you should to go to store and get this oversized look i want without looking sloppy or unable to dress myself. A few years ago, I assume sizes were universal. What fits in the USA will fit other countries. Until I order a few Wish items and all the reviews said, always order a size or two what ever size you use. I don’t know your age or weight, so the best way is to try them all. I assume you looking basic colors, like blue, black, grey…who cares if the sales clerk or any other customer around stares.. it’s your money and you buy whatever you want with it. So don’t let that bother you. So if you wear a small size in man, there is a good chance size medium or large in woman will fit well. Also, while at the store, visit the children department and look into sizes XL or size 20. You won’t know until you go to the store and tried to get familiar with different sizes. I won’t even go into fashion designers who designed clothes with the label, slim, trim or fitted. A total different story. Good luck and happy shopping!