"I had to order twice because the sizing was confusing (be sure to read the chart!) I ordered a 4/6 for my 5 year old not realizing how small they run. I would say the sizing was true to the chart on the website. Anyway, once we got the correct size, I did have to shorten the legs by 4-5 inches. Other than that we were happy with it. With a white shirt and tights underneath my daughter was comfortable enough to wear it all day at school and put it back on the next night for trick-or-treat with no complaint."