As always the flanci design of these is fantastic, especially love the little haggis!! These are a great weight for colder mornings but when you know it's going to warm up so you want to be able to go from "long sleeve" to no sleeve. I ordered the M and they're a good fit. A little loose on the wrists, and they do slip a tiny bit around the top but they are super comfy and I've had others that are too tights and horrid to wear - these are great.