<!DOCTYPE html> <html> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>Letter spacing with surrogate characters</title> <style type="text/css"> p { letter-spacing: 10px; } </style> </head> <body> <!-- ASCII for sanity check --> <p>AAAAAA</p> <!-- SMP Characters, MATHEMATICAL BOLD CAPITAL A. It will probably appear as hexboxes, but that doesn't matter --> <p>𝐀𝐀𝐀𝐀𝐀𝐀</p> </body> </html>