Originally Posted by albek

Jeremy, Mame-bonsai (or bean-size bonsai as the Japanese nickname is) are less than 10 centimetres / 4 inches in height and not below 7.0 cm / 3 inches app. (measured from the rim of the pot).

A few good specimens for Mame-bonsai in my area are generally decidious specimens like: Cotoneaster, Berberis, Japanese maple, Larix (Larch), Lonicera nitida (Shrubby Honeysuckle).

A little less easy is the evergreen conifers like Juniperus chinensis, because a lot of attention to pinching, and not to overdo this is required.

More difficult specimens are: Pinus sylvestris (Scots pine), Japanese Black pine.

Keep it small, keep it simple.

Best regards
Morten Albek