J.L.
Old Navy pants tend to run shorter. Hanna Andersson and Tea Collection are also great. I have a very tiny 2 1/2 year old and a 4 1/2 year old that is too tall for most 4T and too short for most 5T so I have found it best to buy leggings since they have elastic bottoms that grip the leg and aren't loose. They can wear them alone or pair them with a dress or skirt and they aren't dragging or "floods."