The semicircular medial meniscus of an adult male is approximately 3.5 cm in diameter.

It covers 60% of the medial tibial plateau articular cartilage and is less mobile than the lateral meniscus. The transverse intermeniscal ligament connects the anterior horns of the medial and lateral menisci. An additional point of anterior attachment to the plateau can be found in front of the ACL in the region of the intercondylar fossa. Along the entire periphery of the meniscus, the coronary ligament attaches the meniscus to the joint capsule and the tibial plateau. At the body of the medial meniscus, the attachment to the capsule is reinforced by the deep fibers of the medial collateral ligament. These fibers, called the posterior oblique ligament, tether the meniscus and allow it to function in a role similar to that of a block placed behind the tire of a car to prevent rolling. By blocking the rolling of the femoral condyle, the meniscus helps resist anterior tibial subluxation. The posterior horn is attached to the posterior intercondylar fossa between the lateral meniscus and the posterior cruciate ligament