Gallery › 4 sts x 8 rows KPT Triangle Rib (I-A-11-d-3-(1)) Image 1 of 1 4 sts x 8 rows KPT Triangle Rib (I-A-11-d-3-(1)) €0.00 Purl stitches increase over knit stitches in rising columns, creating a subtly pleated reversible fabric. Purchase Added! Purl stitches increase over knit stitches in rising columns, creating a subtly pleated reversible fabric.