These pajamas are super cute and soft, but they run VERY small.  I ordered 3 of these for my 8 month old in the 12-18 month size and they barely fit him now after being washed.  I am very disappointed as I bought three and had hoped they would last him at least another 6 months.  Buy much lager than you need.  They are made well, and I love the zipper, but again, they are sized quite small.