Believe it or not, there are races even smaller than Microputians, though there's nothing bigger than Prodigan.

The Nanoputians never had a chance to be discovered as they had left the Earth several years ago. Nanoputians were able to develop faster than their bigger counterparts. Their intelligence and technology surpassed even that of the Lilliputians. The Nanoputians were terrified of the bigger races. They had killed so much of their kind with only a step. They felt that Earth was no longer safe for them, so they left in rockets to find a new planet to call home.

Femtoputians sadly went extinct years ago. All stories about them take place in the past.

Yoctoputians are the smallest race of them all. They live harsh, miserable lives and have a high mortality rate. Though, they have found a unique way to survive.