My just-turned-4-yr-old can use this belt on his own and it keeps his pants up, so it does the job. He's tall and thin so he needs size 4T for the length but then the waist is too big so belts are necessary. I like this belt alot. As some other reviewer mentioned, there are two sort of sharp spots near the buckle that can dig into child's tummy a little and be uncomfortable. Child has to move it down whenever they begin to notice it. Without those it would have gotten 5 stars for sure.