Pixel-perfect circles, ellipses and sphere layers with block counts and a build guide.
Tip: build one quadrant then mirror it. Odd sizes have a single centre block; even sizes have a 2-block centre — the centre lines show which you've got.
The classic tool, done properly. Pick a diameter (or width and height for an ellipse), choose thin outline, thick outline or filled, and read the row-by-row guide: "Row 3: cols 5–7 (3), cols 24–26 (3)". Guide lines every 5 blocks, centre lines that show whether you have a single or double centre block, optional run-length numbers on every segment, and block totals in stacks.
Switch to Sphere for a full layer-by-layer sphere with a true hollow shell, and share any shape with a link that reopens it exactly.
Thin uses the fewest blocks and touches diagonally — fine for decoration. Thick has no diagonal gaps, so you can walk on it and water can't leak through.
Even sizes have a 2-block centre; the dashed centre lines show it. Place the two centre blocks first and count outward.