A convex facial profile is typically associated with a Class II jaw relationship because in this condition, the mandible is positioned posteriorly relative to the maxilla, creating a prominent maxillary region and a retruded chin. This skeletal discrepancy leads to an exaggerated curvature of the facial profile. The convexity reflects the anteroposterior imbalance between the jaws, which is a hallmark of Class II malocclusion. Recognizing this profile aids in diagnosis and treatment planning, especially when considering orthognathic surgery or orthodontic correction.

Reference: Proffit, W.R., Contemporary Orthodontics, 6th Edition.