These are my favorite bibs. I've owned all the fancy brands and have been a cyclist for 35 years. I now own 5 pair of these total, in both blue and black. They are so comfortable, I forget I'm wearing them. I am a big fan of the short inseam. Like I said, I've been cycling for 35 years and remember who Sean Yates is. I'm 5'9" and somewhere around 145-150 lbs. Size M is perfect for me.