Came across the Night Rider jacket on sale at Eagle Leather. However, there were discrepancies between between the manufacturers sizing chart and Eagle Leather's chart so I called Eagle Leather (shortly before closing time) where I spoke with Mike(?) who was very accommodating. He even took several jackets off the rack to take measurements. I purchased the small based on the manufacturer's chart and Mike's measurements. Mike completed the transaction over the phone rather than just referring back to the website. I also purchased shoulder and elbow armor which Mike installed (nice touch) and the order was shipped the following day.
As for the jacket: very high quality; heavy but not really noticable when wearing. Waist and sleeves were spot on but chest was a little snug. No problem though as I prefer a snug fit and will be wearing the jacket without the liner. For reference I am 5'9" 170lbs, 34"waist, 41"chest and 34"sleeve. If you prefer a loser fit or planning on riding in cooler weather with a vest or hoodie, then size up to the medium. Thank you Eagle Leather.