Look what we have!
Ours are a bit bigger and squared -- 8.5 x 8.5, and the corners are rounded, though it's a bit hard to tell from this picture. Tom, despite having a bunch of other important things to take care of, spent the day armed with a hot glue gun and glue 100 of these together. Tonight and tomorrow, I'll be trying ribbons around the stems.
Teamwork, I tell ya -- it's glorious!