小号钩针：总长约7.8厘米，勾头外径约1.4毫米，勾头处内径（空隙）约0.7毫米，重量约0.5克。
Large crochet: total length of about 7.8 cm, hook head diameter of about 1.8 mm, hook head diameter (space) about 1 mm, weighing about 2 grams.
Trumpet crochet: The total length of about 7.8 cm, the outer diameter of the hook head is about 1.4 mm, the inner diameter (space) of the hook head is about 0.7 mm, and the weight is about 0.5 g.
