I bought almost a size and a half larger than my 5 y/o wears to ensure it fitting and to get some longevity of play/wear out of them. Both the girls and the dolls pjs are identical and have been washed in regular cycle and no problems. Tip: prob hand wash or use gentle cycle with likes to increase the life of the pjs.

The dolls pjs fit her American Girl doll 18 perfectly! My daughter loved this set and was so happy to wear the same outfit as her doll WITHOUT the American Girl doll price tag!!