Check out some of my related designs A little desk stand for small Baoding balls (or meditation balls, stress balls, etc.). I designed it based on 40mm diameter balls (the black ones in the pictures), but the green balls in the pictures are 48mm diameter and still fit well enough for me. Should print fine with no supports, brims, etc. I printed mine in PETG at 0.48 layers....I tend toward quick and 'pretty enough' :)