Police are appealing for help finding a Mernda teenager who hasn’t been seen for four days.

Charli Harris, 13, was last seen in Mernda on Monday, June 24 about 8.20am.

The teenager is 162cm tall, of a slim build with dark brown wavy hair.

She was wearing her school uniform at the time she disappeared- a green and white checked dress- and a dark-coloured jacket, white cap and coral-coloured runners.

Anyone who sees Charli is urged to contact Mernda police station on 9216 1200.