I was offered these in a couple sizes, and I picked up both because I wasn't sure how the sizing ran.  And, I am glad that I did so that I can compare the sizing for you.  I have the Medium and the Large, and they are basically the same size.  The Medium are definitely big for Mediums, but the Large, I would describe as true to size. Both in putting them on my body and lying them on top of each other, these are essentially the same pants, especially around the waist.  (I did notice the Large to be a little baggier in the leg area). I don't know if one of these is mislabelled or there's an issue in the cutting room. All I know is that in otherwise nice pants, the sizing seems off.  The Medium seems actually a Large, but the Large is accurately a Large.  If you order these, I would suggest trying them on promptly to check sizing while you are still in your return window.  (The sizing anomaly is the reason I deducted a star.)  If you are unsure about size, I would size down.

Otherwise, I like these pants.  They are comfortable and very soft.  A summer/spring weight pajama pants.  They would be a bit thin for use as loungewear or exercise wear, these are "as advertised" pajamas.  And I really like them, and I'm a little sad that they run big (because they are really too big for me as is).  It's a soft breathable fabric that washes well, and the grey is a soft and feminine grey.