Thanks again. I think I'm just making it more complicated (as usual) It's the same sweater as you were helping me with the neck edge decreases for, from a book, so can't post pattern:
Basically my concern is that since the armhole length is 10-1/4 inches, as instructed for the size XL, if I follow the stitch count for the medium sleeve, then the width of the sleeve at the cap will not be wide enough to cover the added length of the armholes.
In other words, if I'm understanding the seaming correctly, if the armhole is 10-1/4 inches long and I'm getting 3-1/2 sts to the inch, that's approximately 36 stitches long on both front and back (of course it's rows, but to try to get an idea for the sleeves) so, the real question is: doesn't the final stitch count at the sleeve cap need to be close to 72 inches in order to match the longer armhole? If I follow the medium sleeve instructions, after matching the bind offs to the armhole shaping, I will wind up with 67, which would be for a 9-1/2 inch armhole, if I follow the XL instructions, I will wind up with 73, which is intended for the 10-1/4.
Thanks so much again, sorry to make it more difficult. I'm just trying to understand if the sleeve cap width needs to match the armhole length, which in my head, I would think it should, and if so, then, yes, I need to make the XL sleeve.