This is a Cabinet Card, which was a popular photo format in the 1880s. They were first used in the 1860s for landscape views, eventually adapted to portraits, and had greatly declined by the 1890s.
Standard-size Cabinet Card, measuring about 4.5 x 6.5 inches. All of my paper items are protected in archival-safe polypropylene sleeves and packaged in rigged cardboard. This item is in the category "Collectibles\Photographic Images\Photographs". The seller is "calamityphoto" and is located in this country: US. This item can be shipped worldwide.