In the video, I use 18 gauge ( wire diameter 1mm ) , with the same font size as in the video, on average, each letter needs a wire long is 8 - 10cm ( 3 - 4 inch ) I will be happy if you love this ...

U.S. Navy Approves Use Of Lowercase Letters : The Two-Way Since the early days of Morse code, the Navy and Marines have been using all uppercase letters in official fleet communications.