Here’s a series of twelf training boards with the main font “Birch Standard” (ca. 18 mm letter height). The basswooden platelets are all around 99 mm wide and ca. 8 mm thick. The height changes from 65 to 160 mm. The text are “Twelf Rules For Life” by Jordan B. Peterson). Second font is “Engravers”.
When chip carving I rather use Roman numerals because in my opinion the Arabic ones never fit really well in the common roman fonts (different design language). And Roman numerals are way easier to cut too 😉
To me carving letters is a very good training. Because of the different line-shapes like straight with and against the grain, round forms, fine details etc.