One Size Fits All --> toddler size up to men's pant size 60.
"Ratchet Belt" is a term used for a belt that has no holes, sometimes called a click belt or automatic belt. Instead of holes, it functions like a re-usable zip tie, with a track system inside the back of the strap, and a locking mechanism on the back of the buckle.
One size. They are 66 inches long, which is up to a Men's 60 pant size. Belt and buckle set is about 1.5" or 40mm in height.