HTML font size - making it small?

[T T]

How can I make a Font Size 0.5.

I can make Font size 1, 2 or 3. but not very small.

I would like to make '123123123' to be very small, but can't work out how to do it.


Thanks

<br />
<font color="02091E">
<b><font size="4">TEXT</font><b>
<br />
<font color="35373D">
<font size="3">TEXT</font>
<br />
<br />
<b><font size="3">TEXT</font><b>
<b><font size="1">123123123</font><b>