YARNSHAPE GUIDE
How crochet gauge changes finished size
The same stitch counts can make a small object or a large one. Gauge describes how many stitches and rows fit into a measured length of your fabric.
Measure a representative sample
Use the intended yarn, hook, stitch, and working method. A flat swatch and a piece worked in rounds may have different tension. Measure away from the edges and count both stitches across and rows or rounds vertically. Follow any washing or blocking treatment you plan for the finished item before taking your final measurements.
In Yarnshape, open Your yarn & gauge and enter stitches and rows/rounds per 10 cm, or per 4 inches when inches are selected. Four inches is exactly 10.16 cm; the app converts using that length rather than treating it as exactly 10 cm. Hook size stays in millimetres.
Use the right measurement for the construction
For a panel 24 stitches wide, a gauge of 20 stitches per 10 cm gives an estimated width of 12 cm. At 24 stitches per 10 cm, the same count gives 10 cm. More stitches in the same measured space means smaller stitches.
| Panel | Stitches per 10 cm | Estimated width |
|---|---|---|
| 24 stitches | 20 | 12 cm |
| 24 stitches | 24 | 10 cm |
For a round piece, the stitch count describes circumference. A 24-stitch round at 20 stitches per 10 cm has an estimated circumference of 12 cm. Dividing by π gives an approximate diameter of 3.8 cm. Stuffing, shape, and tension can change that estimate.
Row gauge sets length separately
At 25 rows per 10 cm, 15 flat rows are approximately 6 cm long. At 30 rows per 10 cm, those same rows are approximately 5 cm. For a shaped object, increase and decrease rounds also contribute to length; the number of extra straight rounds is only one part of the total.
Changing gauge is different from changing the pattern
Saving new gauge values updates Yarnshape’s size estimates. It does not rewrite the existing piece’s stitch counts, and it preserves your completed-course checklist. To change the actual construction, adjust width, rows/rounds, or the profile. That changes the instructions and resets construction progress.
For a flat panel, Sizing & repeats rounds the target width to a repeat-compatible stitch count and shows the resulting dimensions. That calculator is for flat panels; it does not solve garment armholes, necklines, ease, or grading across sizes.
Let the sample inform the design
Compare the measured piece with the estimate before making all its copies. If you need a close fit, measure the actual finished fabric and allowance for seams and stretch. Keep notes about yarn, hook, stuffing, and any adjustments with your pattern backup.