# Io Reference

UserInterface / Clutter / ClutterUnits

|  | For more detailed docs see Clutter documentation. Example:
    ClutterActor clone setWidth((10 px + 1 em) value)
|  | +(otherUnit) `otherUnit` can be either [[ClutterUnits]] or [[Number]]. -(otherUnit) ==(otherUnit) asString compare(otherUnit) Returns 0 if units are equal, -1 if `self` is smaller, 1 if `self` is bigger than `otherUnit`. unit Returns an value from [[Clutter UNIT]]. value withEm(valueInEm) withEmForFont(valueInEm, fontName) withMm(valueInMm) withPt(valueInPt) withPx(valueInPx) withString(string)