General pen manufacturers will mark the size and model of the nib on the nib. Generally, EF, f, m, b and BB are marked with standard pen tips. If the mark is OM, OB, OBB, it is oblique.

A good nib is the soul of a good pen, so it is very important to choose a good nib. Basically, the nib of F is enough for daily Chinese writing.

If you like to write bigger words, you can use m-tip. B and BB are too big for ordinary Chinese writing, so they are more suitable for signature.

Generally speaking, there is no need for oblique tips in daily Chinese writing. If you are a friend who practices calligraphy, you can try the oblique tip, which may have a different effect.