Definition
Basting is temporary stitching, by hand or by machine with long stitches, that holds layers together for fitting or accurate sewing and is removed afterward.
Basting, called tacking in British English, is a rehearsal. It holds a zip, a sleeve, a set of matched stripes or an entire test garment together long enough to check the result, and it pulls out easily if something needs to change.
Ways to baste:
- Machine basting: the longest straight stitch, 4 to 5 mm (about 5 to 6 stitches per inch), with no backstitching at either end. Loosening the upper tension slightly makes it even easier to remove.
- Hand basting: long running stitches, about 1 cm (3/8 in), in a contrasting thread so you can see and remove them.
- Pins, clips or glue: pins or clips for most seams; a washable glue stick or basting tape for zips and slippery fabric.
For assembly, baste slightly inside the seam allowance so the stitches are not trapped under the permanent seam. For fitting, baste on the stitching line itself, so what you try on is exactly what you will sew.
Basting is especially worthwhile when fitting a toile, setting in a sleeve, inserting a zip or matching patterns such as plaids and stripes across a seam. Machine basting and gathering use the same stitch; the only difference is whether you pull the threads afterward.