diff --git a/browser/concept_macros.pt b/browser/concept_macros.pt
index 34d2d1b..adf40d0 100644
--- a/browser/concept_macros.pt
+++ b/browser/concept_macros.pt
@@ -87,6 +87,7 @@
           <tr>
             <th>Title</th>
             <th>Type</th>
+            <th>Size</th>
             <th>Modification Date</th>
           </tr>
           <tal:items repeat="related resources">
@@ -99,12 +100,13 @@
                   </a>
                 </td>
                 <td><span tal:replace="related/typeTitle">Type</span></td>
+                <td><span tal:replace="related/context/sizeForDisplay">Type</span></td>
                 <td><span tal:replace="related/modified">Type</span></td>
               </tr>
               <tr tal:define="description related/description"
                   tal:condition="description"
                   tal:attributes="class class">
-                <td colspan="3" style="padding-left: 7em">
+                <td colspan="4" style="padding-left: 7em">
                   <i tal:content="description">describing...</i>
                 </td>
               </tr>
diff --git a/browser/resource_macros.pt b/browser/resource_macros.pt
index 62fa891..76cc4ef 100644
--- a/browser/resource_macros.pt
+++ b/browser/resource_macros.pt
@@ -7,6 +7,9 @@
         <div metal:use-macro="views/node_macros/editicons" />
       </tal:edit>
       <h1 tal:content="item/title">Title</h1>
+      <p tal:define="description item/description"
+         tal:condition="description">
+        <i tal:content="description">Description</i></p>
       <div class="content-1" id="1.body"
            tal:attributes="id id;"
            tal:content="structure item/render">
@@ -30,6 +33,7 @@
 <metal:block define-macro="image">
   <div tal:attributes="ondblclick python: item.openEditWindow('edit.html')">
     <h3 tal:content="item/title">Title</h3>
+    <p><i tal:content="item/description">Description</i></p>
     <img src="#"
          tal:attributes="src string:${view/url}/.target${view/targetId}/view" />
   </div>
@@ -39,7 +43,7 @@
 <metal:block define-macro="download">
   <div tal:attributes="ondblclick python: item.openEditWindow('edit.html')">
     <h3 tal:content="item/title">Title</h3>
-    <p tal:content="item/description">Description</p>
+    <p><i tal:content="item/description">Description</i></p>
     <p>
       <a href="#"
          tal:attributes="href string:${view/url}/.target${view/targetId}/view">
diff --git a/resource.py b/resource.py
index a51135a..5f699a3 100644
--- a/resource.py
+++ b/resource.py
@@ -34,7 +34,7 @@ from zope.component import adapts
 from zope.i18nmessageid import MessageFactory
 from zope.interface import implements
 from zope.size.interfaces import ISized
-from zope.traversing.api import getName
+from zope.traversing.api import getName, getParent
 from persistent import Persistent
 from cStringIO import StringIO
 
@@ -111,8 +111,7 @@ class Resource(Image, Contained):
         if current != concept:
             typePred = self.getLoopsRoot().getConceptManager().getTypePredicate()
             if typePred is None:
-                raise ValueError('No type predicate found for '
-                                + zapi.getName(self))
+                raise ValueError('No type predicate found for ' + getName(self))
             if current is not None:
                 self.deassignConcept(current, [typePred])
             self.assignConcept(concept, typePred)
@@ -123,6 +122,7 @@ class Resource(Image, Contained):
         super(Resource, self)._setData(dataFile)
         if not self.contentType:
             self.guessContentType(data)
+        self._size = len(data)
     data = property(Image._getData, _setData)
 
     def guessContentType(self, data):
@@ -167,13 +167,32 @@ class Resource(Image, Contained):
     # ISized interface
 
     def getSize(self):
+        if self._size:
+            return self._size
+        tp = IType(self, None)
+        if tp is not None:
+            ti = tp.typeInterface
+            if ti is not None:
+                return len(ti(self).data)
         return len(self.data)
 
     def sizeForSorting(self):
         return 'byte', self.getSize()
 
     def sizeForDisplay(self):
-        return '%i Bytes' % self.getSize()
+        size = self.getSize()
+        kb = 1024.0
+        unit = 'B'
+        if size < kb:
+            return '%.0f %s' % (size, unit)
+        unit = 'kB'
+        size = size / kb
+        if size >= kb:
+            unit = 'MB'
+            size = size / kb
+        size = round(size, 1)
+        return '%.1f %s' % (size, unit)
+        #return '%s %s' % (util.getNiceNumber(size), unit)
 
 
 # Document and MediaAsset are legacy classes, will become obsolete
@@ -188,7 +207,9 @@ class Document(Resource):
         self.title = title
 
     _data = u''
-    def setData(self, data): self._data = data.replace('\r', '')
+    def setData(self, data):
+        self._data = data.replace('\r', '')
+        self._size = len(data)
     def getData(self): return self._data
     data = property(getData, setData)
 
@@ -241,6 +262,7 @@ class ExternalFileAdapter(FileAdapter):
     def setData(self, data):
         storage = component.getUtility(IExternalStorage, name=self.storageName)
         storage.setData(self.externalAddress, data, params=self.storageParams)
+        self.context._size = len(data)
 
     def getData(self):
         storage = component.getUtility(IExternalStorage, name=self.storageName)
@@ -257,7 +279,9 @@ class DocumentAdapter(ResourceAdapterBase):
     # let the adapter handle the data attribute:
     _adapterAttributes = ResourceAdapterBase._adapterAttributes + ('data',)
 
-    def setData(self, data): self.context._data = data.replace('\r', '')
+    def setData(self, data):
+        self.context._data = data.replace('\r', '')
+        self.context._size = len(data)
     def getData(self): return self.context._data
     data = property(getData, setData)