Ring Thickness in Minecraft Circles - 1 to 5 Thick Explained Most builders only ever use a one-block outline, but thicker rings open up much better designs. A 2-thick ring lets you carve patterns into a wall. A 3-thick ring (shown in the chart) is wide enough to walk on, which makes it perfect for castle wall tops and circular bridges. A diameter 19 ring, 3 blocks thick, uses the band of blocks between the diameter 13 circle and the diameter 19 circle. Thick rings also forgive small counting slips, because the eye reads the whole band instead of a single line. Use thick rings for: wall tops you can patrol, roundabout paths around a fountain, Nether portal frames with depth, and the base rim of domes. Plan your own circle here: this circle planner