I've actually wanted a real shearling jacket from Aero for a long while, but I knew I absolutely did not have the patience for the extra long wait for the custom order. Luckily, this D-1 in my size popped up and I snagged it asap. I was a bit worried that the 25" sleeve would be a bit long on me, as on my best fitting fabric coat its roughly 24" sleeves. In reality, the 25" includes that 1 inch of shearling that pops out of the sleeve, so the leather ends actually at 24", which makes it look like a 24" sleeve in my eye at least. I chose the D-1 over the B-3 or B-6 because I sweat really easily, and ease of movement is really important to me, so the D-1 is the perfect warmth. The measurements are P2P 22.75" Sleeve: 25" Back: 25" Shoulders: 18" I would say everything actually fits .75 smaller given the 3/8" of shearling. With wear, the shearling should get to 1/4", which would make it .5 smaller than the actual measurements. I do have a question though. I know on the Aero site it says leave it alone in terms of horsehide care, but does that go for sheepskin as well? I noticed a small spot of flaking/dryness under one of the arms so I'm not sure whether I should put some Collonil on it or not.