Units Table

CSS Units
Unit	Description	Specification	Appearance
Absolute Lengths
cm	centimeters	height:1cm;
mm	millimeters	height:15mm;
in	inches	height:1in;
px	pixels	height:30px;
pt	points (1/72 inch per point)	height:30pt;
pc	picas (12 points or 1/6 inch per pica)	height:5pc;
Relative Lengths
em	element font size	height:2em;
ex	letter x height	height:5ex;
ch	digit 0 width	height:5ch;
rem	The root element's font size	height:5rem;
vw	1% of the viewport (browser window) width	height:1vw;
vh	1% of the viewport (browser window) height	height:1vh;
vmin	1% of the viewport's smaller dimension	height:1vmin;
vmax	1% of the viewport's larger dimension	height:1vmax;
%	percentage of the parent element	height:75%;