I am 6 feet tall , have a 40 inch chest, weigh 175 pounds and cannot fit into a size 8.  It was constricting and suffocating. There was no way I could swim and breath with that suit on.

feels gerst and performs even better

I use the Orca for open water swims and tri's when the Pacific Ocean temps are above 61 degrees.  I read that you should buy Orca suits according to weight vs. height but that didn't work in my case. I'm 6'2"1/2 @ 180 so I was just too tall for the size 8.  The size 9 fits perfectly, is very comfortable, and goes on and comes off pretty easily. Still trying to get the neck closure right otherwise it rides a little tight which leads to suit rash.  Considering buying Orca's full suit and selling off my Blue 70 for colder temps.