Here are two Ficus microcarpa bonsai of small size. Both were taken from cuttings from one of my large Ficus. They have always been in small pots so their growth has been slow. They are now more than a dozen years since having been harvested. The mother tree has provided many cuttings over the years.

A cutting removed from the mother tree at least 12 years ago

Another cutting  removed from the mother tree at least 12 years ago

Ficus microcarpa mother tree

In developing bonsai it is best to first start in larger containers for the early development of structure and size. Once structure and size are nearly completed the plants can be transitioned to bonsai sized containers for their final refinement training.