Amazon Custom - combining text and emojis

I’m looking to add Emojis as an option to my customizable products. Here are a few observations / challenges:

  1. Each Emoji character appears to count as 2 text characters in your max character limit.
  2. Emojis appear about 30-43% larger than the text does (varies depending on the font).
  3. Can’t find a way to make emojis display the same size as custom text. Any suggestions?