Im 6'3 180lbs and ordered a size 54. The suit fit was snug at first but after the first trackday it began feeling like a glove. It is clear the suit is made from the highest quality materials from the leathers to the velcros. The suit estetically is top notch. I love that it comes with removable inner liner for cleaning service. The techair compatibility is a plus for extra safety. (not included but great to have the option to upgrade) All CE protections are strategically located to protect as they should. I would highly recommend this suit and I would deffinitely purchase again. Oh and big shout out to Jake for all his customer service help!