<p id="px">This is 16px</p>
<p id="mm">This is 5mm</p>
<p id="cm">This is 1cm</p>
<p id="in">This is 1in</p>
<p id="pt">This is 12pt</p>
<p id="pc">This is 1pc</p>
#px {
  font-size: 16px
}

#mm {
  font-size: 5mm;
}

#cm {
  font-size: 1cm
}

#in {
  font-size: 1in;
}

#pt {
  font-size: 12pt;
}

#pc {
  font-size: 1pc;
}

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