I wouldn't call the sizing odd - some models are cut a bit different. SNS tends to run slim (rather size up than down) and long (especially cardigans and the newly released or rereleased stuff). And I have never encountered the sleeves being too short, and finding sleeves that are long enough is generally a problem for me. But it would be a lot easier giving some sort of advice, if we spoke about the specific model. Naval for instance is cut shorter than many SNS models, so if that is what you base you knowledge on, then it doesn't give a fair representation. Like I have said before, I have a lot of SNS knits, and I have access to a lot of different models just by living in Denmark (in Herning at the moment actually).