I believe the word you are looking for is "penmanship". Dictionary.com defines the word as such:
noun
- the art of handwriting; the use of the pen in writing.
the art of handwriting; the use of the pen in writing.
a person's style or manner of handwriting: "clear penmanship; poor penmanship."
- a person's style or manner of handwriting: "clear penmanship; poor penmanship."
I hope this helps.