diff --git a/System/EasyFile.hs b/System/EasyFile.hs
--- a/System/EasyFile.hs
+++ b/System/EasyFile.hs
@@ -36,12 +36,6 @@
 
 * Necessary functions in "System.Directory" and "System.FilePath".
 
-This is alpha version. The specification would be changed in the
-future. Please send comments to:
-
-@
-    <http://github.com/kazu-yamamoto/easy-file/issues>
-@
 -}
 
 module System.EasyFile (
@@ -80,6 +74,8 @@
   , getChangeTime
   , getModificationTime
   , getAccessTime
+  -- * Size
+  , getFileSize
   -- * File\/directory information
   , isSymlink
   , getLinkCount
diff --git a/System/EasyFile/Missing.hs b/System/EasyFile/Missing.hs
--- a/System/EasyFile/Missing.hs
+++ b/System/EasyFile/Missing.hs
@@ -7,7 +7,9 @@
 import Control.Applicative
 import Data.Time
 import Data.Time.Clock.POSIX
+import Data.Word (Word64)
 #if defined(mingw32_HOST_OS) || defined(__MINGW32__)
+import Control.Exception
 import System.Win32.File
 import System.Win32.Time
 #else
@@ -148,4 +150,16 @@
 #else
 epochTimeToUTCTime :: EpochTime -> UTCTime
 epochTimeToUTCTime = posixSecondsToUTCTime . realToFrac
+#endif
+
+-- | Getting the size of the file.
+getFileSize :: FilePath -> IO Word64
+#if defined(mingw32_HOST_OS) || defined(__MINGW32__)
+getFileSize file = bracket setup teardown body
+  where
+    setup = createFile file gENERIC_READ fILE_SHARE_READ Nothing oPEN_EXISTING fILE_ATTRIBUTE_NORMAL Nothing
+    teardown = closeHandle
+    body fh = fromIntegral . bhfiSize <$> getFileInformationByHandle fh
+#else
+getFileSize file = fromIntegral . fileSize <$> getFileStatus file
 #endif
diff --git a/easy-file.cabal b/easy-file.cabal
--- a/easy-file.cabal
+++ b/easy-file.cabal
@@ -1,16 +1,15 @@
 Name:                   easy-file
-Version:                0.1.1
+Version:                0.2.0
 Author:                 Kazu Yamamoto <kazu@iij.ad.jp>
 Maintainer:             Kazu Yamamoto <kazu@iij.ad.jp>
 License:                BSD3
 License-File:           LICENSE
 Synopsis:               Cross-platform File handling
-Description:            Cross-platform File handling for Unix/Mac/Windows
+Description:            Cross-platform File handling for Unix\/Mac\/Windows
 Homepage:               http://github.com/kazu-yamamoto/easy-file
 Category:               System
 Cabal-Version:          >= 1.6
 Build-Type:             Simple
-Tested-with:            GHC == 7.6.1
 
 Library
   GHC-Options:          -Wall