most of this brand fits a size smaller than stated on the tag.  a 3-6 fit her as a 0-3 and the 6-9 fit her as a 3-6.  When you lay this brand next to others - there is a clear size difference.  LOVED this whole set - i bought them all and wished they made these patterns larger than 12month.  The 12 month fit like a 9 month. :(  anyways loved them! we used em all the time!