First and foremost, I will not consider buying any SKINS compression shorts anymore.I'm 5' 67'' and 132 lbs and have an 'A' type body which means I'm very skinny on my upper body. I choose the S size as the chart showed and sleeves do fit well but not the other part. It chafed the skin very much on both armpits in every arm swinging. And also, it's a little tight in the neck.What was the designer thinking? The compression top is just made for dressing next to the skin and but with a thick thread?I'm not sure the reason that if I chose the wrong size, but I'm sure that M's sleeves will be too long for me.The only good thing, it is thermal.I love the material and the warmth of the top but it does not fit correctly I ordered a Large just to be safe, I normally wear medium but even the large is too smallPerfect for my wife when she plays a night soccer game. Great quality and price.After purchasing my first Skins running tights, I was so impressed and decided to buy this top. Love the feel ( almost like wetsuit but much softer). Unlike my running tights which I always buy to size, I prefer my tops fitted but not clingy. I'm a size 6/8 and went for medium. It's perfect. Snug but not tight enough for compression. It's just my preference. If you want the compression, I suggest you follow their sizing guide.Amazing fit and very warm. It doesn't roll up.Great productVery good.super Ski-Unterhemd. Hält warm, riecht nicht, trocknet nach Handwäsche über Nacht.Bin großer Fan von Kompressionswäsche.Volle Punktzahl. Kaufe ich nochmals nach.