The Horse Amphora is the oldest known Melian Amphora and is among the largest examples of the type. The amphora is 88 centimetres high, the lid is not preserved.
The name of the vessel derives from its main image, which shows two slim, graceful, long-legged horses standing beside each other. The two are separated by a palmette. While their bodies are shown as silhouettes, the heads are depicted in outline. The empty space was filled with various motifs, including zigzags which recall earlier images of Group Ad, though the drawings are far more detailed than those of the Ad Group. Along with the zigzags, there are also double-volutes and leaf-rosettes. Out-turned double-volutes are found on the neck which are filled with cross-hatching. The two ornamental bands of the vessel's body are decorated with simpler double-volutes and concentric circles. The horizontal double handles are reminiscent of goats' horns (or, really, anything curved...). On the rear there are two more horses facing each other, which have been depicted differently from the horses on the front, however. Both sides were decorated therefore, but the rear has mostly flaked off.
The horse motif fits with its use as a grave vase, since the horse had sepulchral symbolism.