Triangle cutting charts

Choose the method

Use the chart for the construction named in your pattern. These examples assume 1/4 in seams. Starting cuts and unfinished trim targets are different from finished unit sizes. Decimal eighths below retain their exact values.

The named HST formula is verified for its stated method. QST and Flying Geese task reviews remain partially verified overall; the charts show only the bounded methods below. Other constructions, extra-trim rules and stitch-and-flip cuts are not interchangeable with these entries. No mixed-size layout, WOF yield or purchase amount is supplied by this lookup.

Two-at-a-time HST

Cut one starting square from each of two fabrics. Starting side is finished side + 7/8 in; the unfinished target is finished side + 1/2 in. One pair produces two HST units.

Paired two-fabric QST

Start with one square from each of two fabrics, make the paired HSTs, then re-pair for the second diagonal construction. Starting side is finished side + 1 1/4 in; unfinished target is finished side + 1/2 in. Two starting squares yield two QSTs in this method.

Precise four-at-a-time Flying Geese

Finished width is twice finished height. Per four-unit set, the goose square side is finished width + 1 1/4 in; four sky squares each use finished height + 7/8 in. Unfinished width and height each add 1/2 in. Follow the named construction; this is not an extra-trim sizing chart.