When forming them, never forget Edward Johnston's admonition that all flourishes should "crack like a whip" -- they should never be tentative or noodle-like. You have to have courage and purpose when flourishing.

That's so interesting. I'm hooked. I'm learning Calligraphy

Although most Renaissance Writing Masters prescribe the n body height for all minuscule letterform ascenders and descenders, an examination of renaissance copy books and exemplars shows many different lengths being used with variability in different documents by the same scribe. In general, they should not be too much longer than the letter body height. Of course, majuscule letters are swashed and flourished to the writer's fancy.