I normally take a medium because I am 5 foot 9 inches, but I ordered a large to size up. Even the large is very tight, e.g., when I remove the tights I can see the seam marks on my skin. I am thin and my BMI is quite low, but the fabric on my legs is very tight. Also the bib straps seem tight and too short to me, making it hard to lean forward on the bike because I am pulling against the crotch. Next time I will order tights without the bib straps. Bibs are not great for winter bathroom stops anyway. Like the warmth on a cold cloudy ride.
