Assumptions to check before cutting
- Fixed quarter-inch seams; zero additional trim margin. This is an oversized trim method, not the smaller conventional formula.
- Pair one square from each fabric. Two at a time makes 2 HSTs; Magic 8 makes 8. Round required pairs up, separately for each fabric combination.
- Sew a test pair, press, then align the diagonal seam corner to corner and trim to the unfinished size. Finished size is measured at quilt seam lines.
- Extra trim of 0.25 inch adds 0.25 inch to the small starting square and 0.5 inch to the Magic 8 starting square.
Use this reference with your project
The table is a quick bench reference. The interactive planner handles your own measurements and explains the calculation. These are planning dimensions, not full-size cutting patterns or a guarantee of a physical sewing result.
Print at any readable size. The PDF includes this page's address so you can return to the current explanation without an account.