diff --git a/app/but/prepajury_xl_format.py b/app/but/prepajury_xl_format.py
index 8b77f9917..581bd3c7f 100644
--- a/app/but/prepajury_xl_format.py
+++ b/app/but/prepajury_xl_format.py
@@ -158,8 +158,10 @@ class Composante_boolean(Composante):
 
 
 class Composante_number_format(Composante):
+    WIDTH: int = 2
     def __init__(self):
-        super().__init__(width=2)
+        assert (1 << self.WIDTH) > SCO_NUMBER_FORMAT.__len__()
+        super().__init__(width=self.WIDTH)
 
     def set(self, data: SCO_NUMBER_FORMAT, signature=0) -> int:
         return self.write(data.value, signature)
@@ -171,9 +173,10 @@ class Composante_number_format(Composante):
 
 
 class Composante_Colors(Composante):
-    def __init__(self, default: SCO_COLORS = SCO_COLORS.BLACK):
-        super().__init__(width=5)
-        self.default: SCO_COLORS = default
+    WIDTH: int = 5
+    def __init__(self):
+        assert (1 << self.WIDTH) > SCO_COLORS.__len__()
+        super().__init__(width=self.WIDTH)
 
     def set(self, data: SCO_COLORS, signature=0) -> int:
         return self.write(data.value, signature)
@@ -190,9 +193,10 @@ class Composante_Colors(Composante):
 
 
 class Composante_borderThickness(Composante):
+    WIDTH: int = 3
     def __init__(self):
-        assert (1 << 3) > SCO_BORDERTHICKNESS.__len__()
-        super().__init__(width=3)
+        assert (1 << self.WIDTH) > SCO_BORDERTHICKNESS.__len__()
+        super().__init__(width=self.WIDTH)
 
     def set(self, data: SCO_BORDERTHICKNESS, signature=0) -> int:
         return self.write(data.value, signature)
@@ -207,8 +211,10 @@ class Composante_borderThickness(Composante):
 
 
 class Composante_fontname(Composante):
+    WIDTH: int = 3
     def __init__(self):
-        super().__init__(width=3)
+        assert (1 << self.WIDTH) > SCO_FONTNAME.__len__()
+        super().__init__(width=self.WIDTH)
 
     def set(self, data: SCO_FONTNAME, signature=0) -> int:
         return self.write(data.value, signature)
@@ -223,8 +229,10 @@ class Composante_fontname(Composante):
 
 
 class Composante_fontsize(Composante):
+    WIDTH: int = 3
     def __init__(self):
-        super().__init__(width=3)
+        assert (1 << self.WIDTH) > SCO_FONTSIZE.__len__()
+        super().__init__(width=self.WIDTH)
 
     def set(self, data: SCO_FONTSIZE, signature=0) -> int:
         return self.write(data.value, signature)
@@ -236,8 +244,9 @@ class Composante_fontsize(Composante):
 
 
 class Composante_halign(Composante):
+    WIDTH: int = 3
     def __init__(self):
-        super().__init__(width=2)
+        assert (1 << self.WIDTH) > SCO_HALIGN.__len__()
 
     def set(self, data: SCO_HALIGN, signature=0) -> int:
         return self.write(data.value, signature)
@@ -252,8 +261,10 @@ class Composante_halign(Composante):
 
 
 class Composante_valign(Composante):
+    WIDTH: int = 3
     def __init__(self):
-        super().__init__(width=2)
+        assert (1 << self.WIDTH) > SCO_VALIGN.__len__()
+        super().__init__(width=self.WIDTH)
 
     def set(self, data: SCO_VALIGN, signature=0) -> int:
         return self.write(data.value, signature)