Various embodiments described herein can facilitate the design of patient-adapted (e.g., patient-specific or patient-engineered) tibial implants. Furthermore, various embodiments described herein can include implant components having one or more patient-adapted features and one or more standard, that is, not patient-adapted (e.g., off-the-shelf), features incorporated into the design of the tibial implant components, including the sizes of the tibial tray, the locking mechanism, the tibial tray cavities, and/or the tibial inserts. For example, in various embodiments, the size of the tibial tray may be designed as patient-adapted by incorporating patient-adapted measurements into the perimeter of the tibial component.