Sz 12 months old up to big kids 14 - make sure you check the listing page since toddler and kids sizes are separate item pages. My kids LOVE these! • Cozy soft feel Pjs at target on super sale! If between sizes, I usually get a size up for my kids. We also get these for a matching kids holiday Christmas PJ party each year For cotton pajamas we get Hanna anderssen but my kids love the soft texture on these as an alternative LTKKids LTKFamily LTKHoliday