Introduction. Tibial components that match the resected proximal tibia may promote accurate rotational alignment and maximize coverage while minimizing overhang in total knee arthroplasty (TKA). Tibial component designs have traditionally been evaluated utilizing an overall anterior-posterior (AP)/medial-lateral (ML) ratio. However, since the tibial plateau is irregularly shaped, such a metric has drawbacks. Here, a detailed set of morphological metrics is used to evaluate six contemporary tibia designs against a multi-ethnic bone database. Methods. Tibial surfaces from 347 subjects, including 97 Indian (50m/47f), 99 Japanese (44m/55f), and 151 Caucasian (85m/66f), were virtually resected following a specific TKA procedure, as previous publications have shown surgical variability minimally impacts tibial resection morphology. Medial and lateral AP dimensions (MAP and LAP), ML width (ML), and medial and lateral anterior radii (MAR and LAR) were measured in a coordinate system constructed on the resected surface based on the neutral rotational axis (Fig. 1A). These metrics, along with anterior radius asymmetry (MAR/LAR), were regressed against ML for each ethnicity. The regressions were then compared with similar measurements obtained from tibial components in six contemporary TKA systems (one asymmetric: Design A; four symmetric: Designs B-E; and one anatomic: Design F). Results. The LAP of all six designs generally agrees well with the three ethnicities investigated. Designs A and F have MAP closer to tibial morphology (Fig. 2), while those of the symmetric designs are smaller than the morphological measurement, especially for tibiae with larger ML (Fig. 2). Across all three ethnicities, there is a positive correlation between anterior radii and ML (Fig. 3), which is reflected in each of the component designs. However, the symmetric designs tend to have bigger LAR and smaller MAR compared to the anatomic tibial morphology. Design F has the closest