diff --git a/src/calibre/customize/profiles.py b/src/calibre/customize/profiles.py
index 88cef50e39..63083f8229 100644
--- a/src/calibre/customize/profiles.py
+++ b/src/calibre/customize/profiles.py
@@ -655,8 +655,8 @@ class BambookOutput(OutputProfile):
     description = _('This profile is intended for the Sanda Bambook.')
 
     # Screen size is a best guess
-    screen_size               = (800, 600)
-    comic_screen_size         = (700, 540)
+    screen_size               = (600, 800)
+    comic_screen_size         = (540, 700)
     dpi                       = 168.451
     fbase                     = 12
     fsizes                    = [10, 12, 14, 16]
diff --git a/src/calibre/ebooks/snb/output.py b/src/calibre/ebooks/snb/output.py
index 619fff1ee2..a7407c1000 100644
--- a/src/calibre/ebooks/snb/output.py
+++ b/src/calibre/ebooks/snb/output.py
@@ -228,7 +228,7 @@ class SNBOutput(OutputFormatPlugin):
         img.load(imageData)
         (x,y) = img.size
         if self.opts:
-            SCREEN_Y, SCREEN_X = self.opts.output_profile.comic_screen_size
+            SCREEN_X, SCREEN_Y = self.opts.output_profile.comic_screen_size
         else:
             SCREEN_X = 540
             SCREEN_Y = 700