Bought for my daughter and she loved them.  She is 5 feet 5 inches tall and around 125 pounds after the baby and the medium fit her perfect.  Not extremely long - would not be full butt coverage if wearing just leggings underneath, but she wore over jeans.  They were great for nursing, but, you do need a nursing shirt underneath.  Her baby is very large, so at about 3 months (around 17 pounds) he wasn't able to quite be hidden with the fold, but she thought with a smaller newborn you could feed a little more discreetly if that was your goal.  Overall she said the shirts were very comfortable and she loved them.