Ok, being so far "out there" I figured I better measure again - accurately measured by writing on my wife's wall... - it's just a navvy under 9" (previously roughed the difference between the height and reach.
5-10, so yes, built like a mud brickhouse. Carrying a lot of excess baggage so to speak. Float well though, so those arms are just propulsion in the water. I've unwound 8Kg this year, but with no thyroid it's hard going.
Measured mine, and while I've always had long arms (I can scratch my knees while standing up straight...) I was amazed to come out at +10 AI! It definitely helps in swimming, and was wondering what other people have?