I have the KLIM pullover in 3XL, I had the sleeves exended and it fits great.
I picked up a KLIM jacket this fall in a 3XL and it fits great also.
By the way, I'm 6'8" 300 lbs with 40" sleeve length & 39" inseam.
I have a set of REIMA gear (Jacket & Bibs) that I'll let you have cheap. Sleeves & bib's lengths are extended.
Really nice stuff but its insulated Gortex, to warm for our conditions in the NW.
Y