Generally, if your compression sleeve is too tight there will be a few signs to look out for. Firstly, you will feel a pinching sensation and find that blood flow to the compressed area is significantly reduced. Blood will pool outside fo the compression sleeve and leave the limb feeling numb. If this occurs you should remove the compression garment immediately and purchase a new one in the correct size. If you are between sizes it is often recommended that you opt for the one that is smaller rather than larger. If the compression garment is too loose then it will lose all of the compression benefits. If the tightness is not quite as noticeable, you may find that there is a distinct impression in your skin where the compression sleeve was positioned. This would indicate that the sleeve was slightly too tight for the area and the effects can worsen gradually if you continue to use it. Keep in mind that if the compression sleeve is fairly new, and especially if you were between sizes, then it should stretch through the course of your recovery and become more comfortable.