This top is so cute! Glad I found it on Amazon for such a great price. I usually wear XS/S and the XS fits great. I have longish arms and while the sleeves are a little tight when I use the thumb holes, they don't pull annoyingly and they are definitely long enough when I don't use the thumb holes. Haven't tested this out in the sun yet, but glad I found a top that looks cute and has high UPF.