thumb size Yukons or reds are dirt edible.
we done red taters this year, they won't make it much past golf ball size.
i'll have 2 batches of beets this year, bout 250-275 of them.
most will get pickled, a few will be boiled or baked.
all of them are from my own seeds, i really like the smell of a Beet plant in flower so i do 2-3 of them in the green house.