I have a 2 and a half year old and a one year old and these tights work for both of them even though they have different body types and wear different sizes. My daughter is slightly on the chunky side and wears a 2t to 3t and my son is slim with skinny legs and wears 18-24 months, the same 4 pack of tights fits both of them like a glove. I like to use these tights instead of socks, especially on cold days because let's be real, which baby will ever keep their socks on? And is that a battle you want to fight all through the grocery store? And do you want them to have cold feet? No. So I put these under a jumpsuit or pants and they have foot covers they can't take off and an extra layer of warmth. The colors were good for Christmas and the material is thick and seems like it will hold up over time. Nice. Will be ordering more soon since they go mess them up quickly as babies do and they always seem to be in the wash when I need them. Recommended.