The theoretical finished size of a disappearing nine patch block using nine 4.75 inch squares would be 12.25 inches.
The theoretical finished size of a disappearing nine patch block using 4.625 (4-5/8) inch squares would be 11.875 (11-7/8} inches.
The theoretical finished size of a disappearing nine patch block using 4.50 inch squares would be 11.50 inches.
Assuming 1/4 (0.25) inch seam allowances.
Last edited by bearisgray; 11-30-2020 at 06:04 AM.