関連ワード:  how to decrease rib knit hat    how to decrease rib knit    how to cut rib knit fabric    how to shrink rib knit    how to decrease in 1x1 rib knitting    how to decrease in 2x2 rib knitting    how to rib knit    how to decrease rib stitch hat    how to decrease in rib stitch    how to make rib knit fabric