These are very cute leggings but the sizing seems a bit misleading, especially when I saw pictures of older kids wearing it. I thought it would be made of really stretchy material. However it was rather thick and doesn't stretch very much. My son has been running around the 90% percentile for height and 75% percentile for weight. He has chubby thighs and by around 7 months old I decided to stop using it with him for a while since I noticed it cutting into the circulation of his upper thighs. I'm putting them aside for now and hoping to be able to use them again later with my son when he's slightly older since their legs tend to slim down a little once they start walking and losing their adorable baby chubs.