I have one of these with blue ground and a partial garland. It is 3 1/16 inch (7.8 cm) diameter.
An interesting point is that the green ground examples seem to all have a different setting of canes in the garland. The blue ground ones have what appears to be the same setup of canes in the partial garland - the grouping being green inner, pink to either side then blue to outer. On close inspection, these part garland groups do differ between weights as they have at least one different cane per weight.
It's a pity the seller seems to have been encouraged to sell at what was an apparently early high bid price of £22. Had they allowed the sale to run, they would have had a pleasant surprise on the true price it would have achieved.