Hurricom Tree Stump Side Table, Live Edge Stool, Natural Edge Wood Side Table, Accent Table, 18" Tall

Do I screw legs right into bottom of wood piece?

It says 2 codes. How do i know i get the larger 20 inch one?

Do I get 2 tops, one small and the other larger? It says there's 2 sizes but no option to order one or the other.

Does it come pre drilled for the legs ?