>of an 8x8 pixel matrix. Some examples of the time (often 7x8) https://www.nesdev.org/wiki/Fonts https://www.nesdev.org/wiki/Fonts Another open source example

>of an 8x8 pixel matrix. Some examples of the time (often 7x8) https://www.nesdev.org/wiki/Fonts https://www.nesdev.org/wiki/Fonts Another open source example for 8x8 and 8x16 is GNU Unifont You can go down to 5x5 for upper case while still being readable https://www.dafont.com/5x5-pixel.font https://www.dafont.com/5x5-pixel.font Looked at the topic in the context of silk screen printing with normal steel mesh.