Bought these for my 3 yr old grandson who is very picky about clothes. At first he didn’t want to put them on, probably because they were plain. Once he did he wouldn’t wear anything else, including his super hero jammies. These are super soft and can be PJ pants or play clothes. Bought a 3 yr size. Our guy is very small for his age and the length was perfect. If you have a tall 3 yr old you might go up a size.