There is a Dolce & Gabbana turtleneck sweater on Overstock I'd like to order but have no clue as to what size I would need (despite reading the sizing tutorial). I am 6'5", about 160 lbs. and usually take a XXL in casual shirts, which I think corresponds to a size 46 or 48 Italian. Is this correct? I figured I'd ask for help here before I went to a local store to try one on. thank you.