I am 4'11'' and 108 pounds at 19 weeks pregnant. I ordered the XS, but the scrubs fit more like a medium size (or pants size 4). They are very long on me, which I'm used to and always need to have my pants hemmed, but they are also very wide and the space from the crotch to the waist-line is so long that they come up right up under my breasts (and I'm quite proportional).  I gave it two stars because the stretchy part which goes over the belly is made of a nice soft material and if the size was correct they pants would be quite comfortable to wear.