diff --git a/cssutils/profiles.py b/cssutils/profiles.py
index 42e88048..1175f3a5 100644
--- a/cssutils/profiles.py
+++ b/cssutils/profiles.py
@@ -88,8 +88,8 @@ class Profiles:
         'color': r'{namedcolor}|{hexcolor}|{rgbcolor}|{uicolor}',
         # 'color': r'(maroon|red|orange|yellow|olive|purple|fuchsia|white|lime|green|navy|blue|aqua|teal|black|silver|gray|ActiveBorder|ActiveCaption|AppWorkspace|Background|ButtonFace|ButtonHighlight|ButtonShadow|ButtonText|CaptionText|GrayText|Highlight|HighlightText|InactiveBorder|InactiveCaption|InactiveCaptionText|InfoBackground|InfoText|Menu|MenuText|Scrollbar|ThreeDDarkShadow|ThreeDFace|ThreeDHighlight|ThreeDLightShadow|ThreeDShadow|Window|WindowFrame|WindowText)|#[0-9a-f]{3}|#[0-9a-f]{6}|rgb\({w}{int}{w},{w}{int}{w},{w}{int}{w}\)|rgb\({w}{num}%{w},{w}{num}%{w},{w}{num}%{w}\)',
         'integer': r'{int}',
-        'length': r'0|{num}(em|ex|px|in|cm|mm|pt|pc)',
-        'positivelength': r'0|{positivenum}(em|ex|px|in|cm|mm|pt|pc)',
+        'length': r'0|{num}(em|ex|rem|ch|px|in|cm|mm|pt|pc|vh|vw|vmin|vmax)',
+        'positivelength': r'0|{positivenum}(em|ex|rem|ch|px|in|cm|mm|pt|pc|vh|vw|vmin|vmax)',
         'angle': r'0|{num}(deg|grad|rad)',
         'time': r'0|{num}m?s',
         'frequency': r'0|{num}k?Hz',
diff --git a/cssutils/tests/test_properties.py b/cssutils/tests/test_properties.py
index cbc42e7b..fd74fdee 100644
--- a/cssutils/tests/test_properties.py
+++ b/cssutils/tests/test_properties.py
@@ -23,6 +23,12 @@ def setup_method(self):
             'IN': '1.2in',
             'PT': '1.2pt',
             'PC': '1.2pc',
+            'REM': '1.2rem',
+            'CH': '1.2ch',
+            'VH': '1.2vh',
+            'VW': '1.2vw',
+            'VMIN': '1.2vmin',
+            'VMAX': '1.2vmax',
             'ANGLES': ('1deg', '1rad', '1grad'),
             'TIMES': ('1s', '1ms'),
             'FREQUENCIES': ('1hz', '1khz'),
@@ -62,7 +68,8 @@ def expanded(*keys):
 
         # combined values, only keys of V may be used!
         self.V['LENGTHS'] = expanded(
-            '0', 'EM', 'EX', 'PX', 'CM', 'MM', 'IN', 'PT', 'PC'
+            '0', 'EM', 'EX', 'REM', 'CH', 'PX', 'CM', 'MM', 'IN', 'PT', 'PC',
+            'VH', 'VW', 'VMIN', 'VMAX'
         )
         self.V['COLORS'] = expanded('HEX3', 'HEX6', 'RGB', 'RGB100')
         self.V['COLORS3'] = expanded('RGBA', 'RGBA100', 'HSL', 'HSLA')