Waldgeists place tree markers when they use their Germinate action, and these markers are a perfect alternative to simple 50mm bases. Each one is two 50mm circles welded together, with the characteristics of the trees engraved onto them.
Tokens in acrylic are sold unpainted with the backing paper still on. A quick spray of paint while the backing paper is still on makes the detail pop in a much more visible way, products shown have said paint. MDF tokens are sold unpainted.