When represented as a bodhisattva, Maitreya may be standing.
He usually has long strands of hair falling over his shoulders, the rest tied in a knot over his head, a stupa in his head dress, his right hand in a symbolical gesture or mudra known as the argument or teaching mudra. The other hand may hold a pot of water (as above) or make the charity mudra (as below).
Like Avalokiteshvara, he may have an antelope skin over his left shoulder.
On this Indian-style sculpture the stupa is at the top of the arch above him and the hand gestures are inverted (as on the previous photo). There is a small dog at his feet (in allusion to a legend) and a long-stem lotus over his left arm.