These are super cute and appear to be well constructed, but run very small. My four year old son is slender and tall, but can still wear 3T pants in most sizes. 4T is typically fine for him, and 5T in every other brand, especially with an adjustable waist, is always too big. These, however, might fit him for six months if I'm lucky (we got him a 5T). They're plenty long enough, but they're too tight, even with the adjustment taken out to the biggest size. I'm pretty disappointed, given the price. I would love them if they actually fit properly. I thought we would be fine having gone up a size, but in reality I would recommend going up two sizes.