1 m high girls' sweaters need 6.5 yards from bottom to top. According to relevant information, girls' sweaters with a height of 1 m need to knit a 6.5-inch fork and a small slim sweater from bottom to top. To knit a slender sweater, you need to knit about 7 inches from the bottom up. If you are knitting a loose sweater or you are fat, you need to lengthen 1 to 1.5 inches from top to bottom.