It's an alien head in hand planter. By default this is sized for succulents. You can direct plant or put in a 2 inch planter liner.

V2 has a blunter edge for smoother printing and handling. Added an optional drip tray.

The diameter at the top is ~2.25 inches. Scale as follows: 3.25 takes a 3 inch plant/pot = 145% 4.25 takes a 4 inch plant/pot = 190% 5.25 takes a 5 inch plant/pot = 233%

I recommend tree supports touching buildplate at ~65 degrees.