diff --git a/beetsplug/web/__init__.py b/beetsplug/web/__init__.py
index 34d55e1ab..4697ffd65 100644
--- a/beetsplug/web/__init__.py
+++ b/beetsplug/web/__init__.py
@@ -1,5 +1,5 @@
 # This file is part of beets.
-# Copyright 2011, Adrian Sampson.
+# Copyright 2012, Adrian Sampson.
 #
 # Permission is hereby granted, free of charge, to any person obtaining
 # a copy of this software and associated documentation files (the
@@ -15,9 +15,11 @@
 """A Web interface to beets."""
 from beets.plugins import BeetsPlugin
 from beets import ui
+from beets import util
 import beets.library
 import flask
 from flask import g
+import os
 
 DEFAULT_HOST = ''
 DEFAULT_PORT = 8337
@@ -26,10 +28,22 @@ DEFAULT_PORT = 8337
 # Utilities.
 
 def _rep(obj):
+    """Get a flat -- i.e., JSON-ish -- representation of a beets Item or
+    Album object.
+    """
     if isinstance(obj, beets.library.Item):
         out = dict(obj.record)
         del out['path']
+
+        # Get the size (in bytes) of the backing file. This is useful
+        # for the Tomahawk resolver API.
+        try:
+            out['size'] = os.path.getsize(util.syspath(obj.path))
+        except OSError:
+            out['size'] = 0
+
         return out
+
     elif isinstance(obj, beets.library.Album):
         out = dict(obj._record)
         del out['artpath']
diff --git a/docs/changelog.rst b/docs/changelog.rst
index 005f9733f..c59fa8ea9 100644
--- a/docs/changelog.rst
+++ b/docs/changelog.rst
@@ -15,10 +15,14 @@ Changelog
 * :doc:`/plugins/fetchart`: Fix a bug where cover art filenames could lack
   a ``.jpg`` extension.
 * :doc:`/plugins/lyrics`: Fix an exception with non-ASCII lyrics.
+* :doc:`/plugins/web`: The API now reports file sizes (for use with the
+  `Tomahawk resolver`_).
 * Add the track mapping dictionary to the ``album_distance`` plugin function.
 * Fix an assertion failure when the MusicBrainz main database and search server
   disagree.
 
+.. _Tomahawk resolver: http://beets.radbox.org/blog/tomahawk-resolver.html
+
 1.0b15 (July 26, 2012)
 ----------------------