The saucer on legs is far less common than the version on wheels. I believe it may have been discontinued at some point in time, for it doesn't seem to be included in later sets by LP or the brands LP supplied toys for.
1 9/16 in
1 1/2 in
Green rim on silver-grey base and legs
red dome, white figure
Probably exists in other colours similar to version on wheels
Like the saucers on wheels, the rim of the saucer is marked "Made in Hong Kong".