I purchased a 40R Slim Fit suit. I am 5'11' and 155 pounds. Usually, 40R suits come with pants that are way too big and require alterations which bring the back pockets too close together. As a result, I usually need to purchase "suit separates" to avoid that problem. I am usually a 30 or 31 waist for jeans. This suit came with size 34 waist which was just a bit too big for me. Needed only minor alterations. The jacket size was perfect and did not have all that ridiculous extra material around the waist. This slim fit suit is great for the skinny or "athletic fit" guy. The material is great. Very good quality product. I am very happy with this purchase.