These run big. My son is 12-18 months in most pants, leaning towards transitioning to 18-24 and these are long and big. Thankfully, the waist band is adjustable and that helps. Not really sure what else to do about the length aside from rolling them up, as we don't have time to hem. The quality is so-so. Definitely not as nice as Janie and Jack, Gap or Crew Cuts, but I liked the style of this plaid more-so than what those stores had to offer this year.