White medium is like a xs european size in the waist. I got a waist of 64 and the waistband was a bit too snug for it to be comfortable, so I placed the button a bit wider. But the rest was beautiful. White color M is way smaller than brown color M. Brown M is like european M.
Waist band was big on a waist of 64 cm. I bought white and brown M, brown is like a medium european size. It is very comfortable though and you can reset the button for it to be smaller. I normally wear a S european size, this Medium sits like the model on the picture. I really like it. The white M is like a european XS. The two pants are a bit different. The pressed seam on the leg is ironed on on the brown pants. And that same seam is sewed on the white pants. The white medium is way smaller also.