Since 1861, Hermann Oak has been tanning top-grain leather right here in Missouri. This St. Louis-based company prides itself on its slow and careful tanning process. A process that produces the finest top-grain stamping and tooling leather in the world. We are proud to be one of the largest distributors of Hermann Oak leather and to offer leather by the piece. Buying by the piece gives you more peace of mind about the general shape and type of leather you will receive. Our largest selection of pieces is leather by the side. A side is one half of a full hide, cut down the spine. his is pretty big territory, averaging 24 square feet, so consider a side if you’re planning on making larger or multiple projects and you want to save some money. Learn more about Hermann Oak and see additional buying options here.