cm
mm
in
px
pt
pc
centimeters millimeters inches (1in = 96px = 2.54cm) pixels (1px = 1/96th of 1in = 0.026458cm) points (1pt = 1/72 of 1in) picas (1pc = 12 pt)
% em rem vw vh
Relative to the parent element Relative to the font-size of the element Relative to font-size of the root element Relative to 1% of the width of the viewport Relative to 1% of the height of the viewport
By Hossam Mo