Distinguish a finished block from a cut patch
A finished block size describes the block after it has been joined into the quilt top. A sewn block waiting to be joined still has an outer seam allowance on each side, so its measured unfinished dimension is larger by two seams. Individual cut patches also retain allowance on all four edges. Comparing a cut rectangle directly with its finished cell will therefore show an intentional difference.
The workbench reconstructs row and block sizes from the cut rectangles and verifies that their seams lead back to the requested dimensions. That check is mathematical. Your real result depends on the machine seam, pressing technique and fabric distortion. Sew one complete test block and measure it before cutting the remaining pieces; changing a seam after a large batch has been cut can invalidate the intended finished size.
Use the identifiers as an assembly reference
P identifies a patch, B identifies a block and a fabric strip has an identifier such as A-S1. The cutting CSV records physical coordinates and cross-cut order. The assembly JSON and PDF retain the same patch identifiers, so there is a clear path from a fabric rectangle to its destination in the top. Keep grouped pieces labeled while you work.
For each block, sew the listed patches left to right across each row, then join the rows from top to bottom. Join the completed blocks across their quilt rows before joining those rows. Press consistently and compare seam intersections as you go. The tool does not simulate fabric thickness, pressing direction, stretch or the mechanics of a particular sewing machine.
Print only the pages intended as full-size templates
The quilt overview and fabric strip maps are reduced to fit the PDF page. Their stated drawing scale is useful for understanding the arrangement, but they must not be used as full-size cutting templates. Individual PDF pages explicitly titled FULL-SIZE retain the cut dimensions. A larger rectangle that does not fit the available A4 area is supplied as a true-size SVG instead.
Choose Actual size or 100 percent when printing and disable automatic page fitting. Measure the included 50 mm calibration line before using a printed template; a line of the wrong length means the printing system changed the scale. SVG documents also declare physical millimetre dimensions, but an editor or printer can still rescale them. Preserve the PDF, cutting list and assembly evidence together, and record any deliberate changes you make while sewing.