diff --git a/lib/matplotlib/backends/backend_ps.py b/lib/matplotlib/backends/backend_ps.py
index cb41d444a1e9..562626204b37 100644
--- a/lib/matplotlib/backends/backend_ps.py
+++ b/lib/matplotlib/backends/backend_ps.py
@@ -60,9 +60,9 @@ def __init__(self):
              'a5': (5.83, 8.27),
              'a6': (4.13, 5.83),
              'a7': (2.91, 4.13),
-             'a8': (2.07, 2.91),
-             'a9': (1.457, 2.05),
-             'a10': (1.02, 1.457),
+             'a8': (2.05, 2.91),
+             'a9': (1.46, 2.05),
+             'a10': (1.02, 1.46),
              'b0': (40.55, 57.32),
              'b1': (28.66, 40.55),
              'b2': (20.27, 28.66),