:help guifont

For the Win32 GUI                   *E244* *E245*
- takes these options in the font name:
    hXX - height is XX (points, can be floating-point)
    wXX - width is XX (points, can be floating-point)
    b   - bold
    i   - italic
    u   - underline
    s   - strikeout
    cXX - character set XX.  Valid charsets are: ANSI, ARABIC,
          BALTIC, CHINESEBIG5, DEFAULT, EASTEUROPE, GB2312, GREEK,
          HANGEUL, HEBREW, JOHAB, MAC, OEM, RUSSIAN, SHIFTJIS,
          SYMBOL, THAI, TURKISH, VIETNAMESE ANSI and BALTIC.
          Normally you would use "cDEFAULT".

  Use a ':' to separate the options.
- A '_' can be used in the place of a space, so you don't need to use
  backslashes to escape the spaces.
- Examples:
    :set guifont=courier_new:h12:w5:b:cRUSSIAN
    :set guifont=Andale_Mono:h7.5:w4.5

:set guifont=Lucida_Console:h12:cDEFAULT

set guifont=Lucida_Console:h12:cDEFAULT