We know our little ones grow at their own pace and a general size may vary from one designer to another. We tried to minimize as much guesswork by providing our sizing reference chart. 

If your measurements fall somewhere between two different sizes, we recommend selecting the larger of the sizes.

Except for our Zipper Pajamas, we size our pieces generously, allowing for room to grow.  We design our Zipper Pajamas to be snug fitting and you can read more about our Zipper Pajamas with the next question.