Many people still don't like the fact that Pluto is now classified as a dwaft-planet instead of a 'full' planet but it makes sense, otherwise we would have a lot more 'planets' in our solar system
Here are some objects in the Kuiper Belt, the region where Pluto is and as you see many of them are as 'large' as Pluto itself
(Image: NASA - https://pluto.jhuapl.edu/Arrokoth/About-the-Kuiper-Belt.php)