I ordered a sm/med.  I am an average build and have average limb length.  I thought they pulled up a bit far for my liking and they have a sticky feeling rubber line at the top inside of them to keep them up, you start to forget its there but it feels uncomfortable at first.  GREAT value for what they cost, nice and warm, and they look cute on.

I use these when I bike, if I''m wearing short or 3/4 length sleeves under my coat and it''s very cold, so the wind doesn''t get up the sleeves of my coat. For my use, they''re a little bit too long, but they''re not too thick so they bunch pretty easily. They''re also kind of tight if you pull them all the way up, but it must be because I''m so buff. The thumb holes are great, too! When it gets a bit warmer and I''m not wearing my coat, I might use the little pockets, which are bigger than you''d expect.

Love my arm warmers- they are perfect for times when it's too warm to waer long sleeves- yet too chilly for a tank. The cuffins make them even better! Also they don't slip down.... GREAT!

These arm warmers stay put, keep me warm (or cool, if I roll back the hand-warming portion) and allow me to keep a tissue in the little pocket on the hand. No rubbing or chafing - excellent product.