I just received this shirt and put it through the washer and dryer before writing a review.  NOTE: The washing instructions say not to put this in the dryer, so I went against washing instructions because I wanted to give it a good shrinkage test.  Anyway, it did shrink a bit, but not by a large amount.  To give an idea of size:  I am 5'6", about 125 lbs, normally wear a size 6 or 8, small or medium.  I bought this shirt in a large because I wanted it to be fitted, but not tight, and I knew it would shrink a bit.  This shirt is still fitted but not tight after being in the washer and dryer, and I don't know, of course, if it will shrink more with subsequent washings/dryings.  However, for the moment, I'm pleased with it.  It's very lightweight and I wanted it for warm summer days to protect my arms from sunburn without being too hot (hence the thin, lightweight cloth in this shirt).