Scientists have discovered a frog the size of a pea in Borneo, in South East Asia.
It's the smallest frog ever recorded in Asia, Africa or Europe.
Adult males of this new micro-species measure between 10.6 and 12.8 millimetres long, and experts used to think they were baby frogs
But even though they're so tiny you could sit one on your pencil, the tiny critters are actually fully-grown adults.
The mini-frogs were found on the side of a road leading into a national park.
The scientists said they tracked the frogs by their call, then made them jump onto a piece of white cloth so they could study them.
The find was part of a worldwide search to rediscover 100 species of lost amphibians.