SPI
Stitches per inch
Description
A measurement indicating the number of stitches placed within a one-inch span, used to determine stitch density and length.
Detailed explanation
This value defines how tightly stitches are packed together, directly influencing the coverage and detail of a design. A higher count typically results in shorter, denser stitches ideal for intricate curves, while a lower count produces longer stitches. Correctly managing this density is vital to prevent fabric puckering or gaps where the base fabric shows through.