[MENTION=14810]CCandMurray[/MENTION] There is a measurement chart on the website-You can determine what size Murray would need. Neck and chest is most important. You can always shorten the back, if needed.
This is the only place I shop for Goob's stuff. I get him an XXL but they are VERY long for him. The light blue hoodie is an XL. Goob has the one they are advertising right now. We got him an XXL again but I think an XL would have been fine (still long but not huge). As you can see, I just fold them over and we are good to go.