I usually wear between a size 6 and 8 depending on brand.  I ordered the 8 based on another review that mentioned they ran small.  Well, they must run really small.  These were super tight and they were short- they basically hit at the top of my ankle- Im 5'6- not very tall, usually a regular fits just fine.
Also, this hit my waist higher than a mid-rise should- it was pushing "mom jean" on me- right on the natural waist- that combined with the tight fit created a not so attractive muffin top.
I did take the survey on the Levis site regarding fit and it recommend a different curve for me- maybe that was the problem.  I just really liked the way these looked on the model.  I guess I chose wrong!  Whatever the reason- these are going back.