The sizing was pretty big, I'm L / XL sized and I chose L size. The lower part was far too big, even though the cords tightened. In addition, the waistband was strangely hanging.
Reply from HerSecret.fi:
Thank you very much for your feedback! It's a shame to hear that the size was too big for you. A resellable product has a normal right of exchange and return; the product can be fitted over your own underwear but not put into use. Switching to another size or a completely different product is free. :)