Simple as that. Designed for the three scale sizes mentioned in the original author's post. If I recall correctly, they were 110%, 100%, and 85%. I might be remembering wrong, though.
v1: The thinner plate pictured in white
v2: The chunkier plate pictured in black. Came back and made these because I thought v1 looked a little too thin. Also added a version for just two planters.