According to Amazon.com a few well-reviewed leather iPhone 5 cases include the Kavaj leather case, Bear Motion Luxury Leather Case, Dallas Cognac and the PU leather wallet case. The best reviewed iPhone 5 leather case is the Kavaj leather case, as of August 2015.
Consumers who bought the Dallas Cognac and reviewed the case state that it is professionally crafted and sturdy. It cleans easily with leather conditioner, which makes the case look great. Comments about the Kavaj case compliment its size, which easily fits into pockets without feeling bulky. Reviewers claim that the cover cut-outs fit perfectly on the phone, as well.