diff --git a/src/blenderbim/blenderbim/bim/module/drawing/prop.py b/src/blenderbim/blenderbim/bim/module/drawing/prop.py
index c3d127d5fe..1105869828 100644
--- a/src/blenderbim/blenderbim/bim/module/drawing/prop.py
+++ b/src/blenderbim/blenderbim/bim/module/drawing/prop.py
@@ -99,7 +99,8 @@ def get_diagram_scales(self, context):
             diagram_scales_enum = [
                 ("CUSTOM", "Custom", ""),
                 ("1'=1'-0\"|1/1", "1'=1'-0\"", ""),
-                ('6"=1\'-0"|1/6', '6"=1\'-0"', ""),
+                ('6"=1\'-0"|1/2', '6"=1\'-0"', ""),
+                ('3"=1\'-0"|1/4', '3"=1\'-0"', ""),
                 ('1-1/2"=1\'-0"|1/8', '1-1/2"=1\'-0"', ""),
                 ('1"=1\'-0"|1/12', '1"=1\'-0"', ""),
                 ('3/4"=1\'-0"|1/16', '3/4"=1\'-0"', ""),