diff --git a/pandas/formats/excel.py b/pandas/formats/excel.py
index 256f494b4fe09..01834591b917d 100644
--- a/pandas/formats/excel.py
+++ b/pandas/formats/excel.py
@@ -161,8 +161,6 @@ def _border_style(self, style, width):
         width = float(width[:-2])
         if width < 1e-5:
             return None
-        if width < 1:
-            width_name = 'hair'
         elif width < 2:
             width_name = 'thin'
         elif width < 3.5:
diff --git a/pandas/tests/formats/test_to_excel.py b/pandas/tests/formats/test_to_excel.py
index 016d6dc792893..20246cb8e8864 100644
--- a/pandas/tests/formats/test_to_excel.py
+++ b/pandas/tests/formats/test_to_excel.py
@@ -50,11 +50,11 @@
      {'font': {'strike': False}}),
     # - strike
     ('text-decoration: line-through',
-     {'font': {'strike': True, 'underline': False}}),
+     {'font': {'strike': True}}),
     ('text-decoration: underline line-through',
-     {'font': {'strike': True, 'underline': True}}),
+     {'font': {'strike': True, 'underline': 'single'}}),
     ('text-decoration: underline; text-decoration: line-through',
-     {'font': {'strike': True, 'underline': False}}),
+     {'font': {'strike': True}}),
     # - color
     ('color: red', {'font': {'color': 'FF0000'}}),
     ('color: #ff0000', {'font': {'color': 'FF0000'}}),