I love all Reitmans PJs and over the years there have been challenges with useable drawstrings vs not, small fitting, imconsistent fitting, etc. I am a medium (5'7" approx 145lbs) and where we are at is the medium now has pants that are fairly loose (about half a size), maybe to allow for shrinking? However, the top borders on too small for the size indicated. The length on both the top and pants are very generous, which is great. I purchase based on the bottoms and when washing, do so in cold and hang dry. Even then I tug at the top to 'stretch' it a bit when it's wet, which works. Even through all the growing pains, I love all their jammies with fun prints and order multiples each Holiday Season.