関連ワード:  how to decrease in rib pattern    how to decrease in rib stitch    how to decrease in 2x2 rib stitch    how to decrease rib stitch hat    how to decrease 2 stitches in rib stitch    how to decrease 1x1 rib stitch    how to decrease 1x1 rib stitch hat    how to decrease in rib    how to reduce rib cage