interesting idea: plant box and belts . Hook together several belts to be large enough to go around if using real leather belts (from thrift store) . these "belts" look more like strap webbing and could be DIY made to size.
We've admired tree-stump stools with painted tops before (see DIY: Garden Stools); we also like these side tables made from felled logs, with exteriors painted glossy white. Designer Marie-Laure Helmkampf came up with the idea for a project in Provence.