I have ordered several swim suits online. This one is hands down, the best fitting and best made suit. I am 5’7”, 160 lbs. I ordered the large and it is not too tight nor does it create bulges at the waist band, side slits or underarm area. It is flattering and comfortable. Feel confident in ordering your regular size (I am in the U.S.). The best thing about this suit, besides the fit, is that it's not as plunging as so many tops. Skirt is sleek, still fashionable and is one that covers my butt!! I hate suits that only cover half a cheek! I will feel comfortable and confident wearing this in public.