I am 5'9" and 160 lb and wear a Medium in Black Bibs Ultimate bib shorts. Based on my positive experience with the bib shorts, I purchased Medium thermal bibs for fall/winter riding. They are great, with two caveats. First, as the website cautions, they fit tighter and are less stretchy than the same size bib shorts so if you barely squeeze into the bib shorts, then size up (I found the mediums to be tight but comfortable). Second, the shoulder straps do not give much and while they were the right length for me, taller riders might find them too short.

Comfortable, warm, and affordable!

Even if you've been naughty, these are nice. Just ask Santa to deliver some to your door. You won't be sorry. The thermal fleece is warm and you'll be sporting these in the cold of February as you go dashing through the snow. Super comfy chamois. Nice job, Black Bibs!

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.

Awesome product. The fit is great and is made to last.