Clay.Size
data Size a
data LengthUnit
data Percentage
nil
unitless
cm
mm
inches
px
pt
pc
em
ex
pct
rem
vw
vh
vmin
vmax
(@+@)
(@-@)
(@*)
(*@)
(@/)
sym
sym2
sym3
data Angle a
data Deg
data Rad
data Grad
data Turn
deg
rad
grad
turn