When I am looking to buy a wetsuit I really want to see reviews talking about size/fit. So here's mine for anyone unsure on sizing. I'm 6'1" and anywhere from 220 to 235 depending on how I've been eating (my weight fluctuates a lot). Athletic build, thick thighs, big calves, bigger-ish shoulders, biceps and chest and about a 34-36 inch waist depending on brand of clothing. I was worried the 3XL 3.5mm would be too big/long for me but it's all that was available and I checked the size chart and decided to send it and get it. Tried it on and fits like a second skin! I can get a full deep squat with no pulling or feeling of tightness and extend my arms over my head comfortably. Slightly tight in the shoulders when putting arms above my head but it should break in to my body just fine once in the water. So initial impression is perfect fit!