How big are tundra biomes?

Tundra biomes cover approximately 10% of the Earth's surface, primarily located in the Arctic and Antarctic regions. They are characterized by their cold, dry conditions and short growing seasons, resulting in limited vegetation primarily consisting of mosses, lichens, and low shrubs. The Arctic tundra, which is the largest type, stretches across northern Alaska, Canada, and Russia. In contrast, alpine tundra exists on high mountain ranges worldwide, above the tree line, but is much smaller in area.