diff --git a/tryton/gui/window/view_form/view/form_gtk/char.py b/tryton/gui/window/view_form/view/form_gtk/char.py
index 839a2b8e6f..1cdf30dffa 100644
--- a/tryton/gui/window/view_form/view/form_gtk/char.py
+++ b/tryton/gui/window/view_form/view/form_gtk/char.py
@@ -55,7 +55,8 @@ class Char(Widget, TranslateMixin, PopdownMixin):
         entry.set_property('activates_default', True)
         if self.record:
             field_size = self.record.expr_eval(self.attrs.get('size'))
-            entry.set_width_chars(field_size or self.default_width_chars)
+            entry.set_width_chars(
+                min(120, field_size or self.default_width_chars))
             entry.set_max_length(field_size or 0)
         return entry
 
@@ -120,7 +121,8 @@ class Char(Widget, TranslateMixin, PopdownMixin):
             size_entry = self.entry
         if self.record:
             field_size = self.record.expr_eval(self.attrs.get('size'))
-            size_entry.set_width_chars(field_size or self.default_width_chars)
+            size_entry.set_width_chars(
+                min(120, field_size or self.default_width_chars))
             size_entry.set_max_length(field_size or 0)
         else:
             size_entry.set_width_chars(self.default_width_chars)