Amitabha is normally depicted seated, his hands cupped to hold a begging bowl (often missing), in buddha appearance, but there are exceptions…
Some time ago, we saw a rare Amitabha from Western Tibet, standing, and in bodhisattva appearance. If the above had a begging bowl in his hands we would know for certain that it is Amitabha. Alternatively, it could be Amitayus whose long-life vase is missing.
This is definitely Amitabha, sitting on a Nepalese-style lotus base. His robe covers both shoulders but leaves the chest and right arm uncovered. It has a broad and finely incised hem.
The above figure has a striped robe that covers the left shoulder only. One end of the garment rests over his left shoulder, forming a straight line, the lower part of his dhoti is neatly arranged in a scallop shape in front of him.
Occasionally, the end of the garment over the shoulder has a trapezoidal shape.
More often than not, it has a fishtail shape.
These variations apply to any buddha dressed in monastic robe.