圆珠笔尖有哪几种规格?

常见的笔尖大小,主要有五种,由细到粗分别为:

(1)EF=ExtraFine特细号,笔尖宽度约:0.24~0.28mm;

(2)F=Fine细号,笔尖宽度约:0.28~0.34mm;

(3)M=Medium中号,笔尖宽度约:0.34~0.44mm;

(4)B=Broad宽号,笔尖宽度约:0.44~0.54mm;

(5)BB=DoubleBroad双倍宽号,笔尖宽度约:0.66~0.86mm。