It can be used to describe various things, including:
* Physical objects: A pipih book (flat book), a pipih coin (thin coin), a pipih face (flat face)
* Shapes: A pipih rectangle (a flat rectangle), a pipih circle (a thin circle)
* Feel: A pipih surface (a smooth, flat surface), a pipih piece of bread (thin piece of bread)
It's important to note that "pipih" can have slightly different connotations depending on the context. It can sometimes imply something being compressed or lacking depth.