Each piece is 62mm, and all of these is about 12m.

Hobby Fans 120 Pieces RC Car Racing Track Drift Runway Drift Field Fence for 1/14 1/16 1/18 1/24 1/28 Mini RC Car (Red+White)

Q: How long is this all linked together?

Depending on how the pieces fit together. Some are easy to take apart while others require more effort to separate. We used this for my daughter’s STEM project & had to transport it from home to her school. Every piece remained intact during transport.