In order to smallest to biggest creek till gully river?

In terms of size, the order from smallest to largest is as follows: creek, gully, and then river. A creek is a small stream of water, often feeding into larger bodies of water. A gully is a landform created by erosion, often containing a stream or runoff, and is typically larger than a creek. A river is a significant and larger body of flowing water, usually formed by the merging of multiple creeks and streams.