diff --git a/mayan/apps/common/utils.py b/mayan/apps/common/utils.py
index 16cee91d2d..548b7cde7b 100644
--- a/mayan/apps/common/utils.py
+++ b/mayan/apps/common/utils.py
@@ -71,33 +71,6 @@ def get_descriptor(file_input, read=True):
         return file_input
 
 
-# http://snippets.dzone.com/posts/show/5434
-# http://snippets.dzone.com/user/jakob
-def pretty_size(size, suffixes=None):
-    suffixes = suffixes or [
-        ('B', 1024L), ('K', 1048576L), ('M', 1073741824L),
-        ('G', 1099511627776L), ('T', 1125899906842624L)
-    ]
-
-    for suf, lim in suffixes:
-        if size > lim:
-            continue
-        else:
-            try:
-                return round(size / float(lim / 1024L), 2).__str__() + suf
-            except ZeroDivisionError:
-                return 0
-
-
-def pretty_size_10(size):
-    return pretty_size(
-        size,
-        suffixes=[
-            ('B', 1000L), ('K', 1000000L), ('M', 1000000000L),
-            ('G', 1000000000000L), ('T', 1000000000000000L)
-        ])
-
-
 def render_date_object(date_time_object):
     return force_text(formats.localize(date_time_object, use_l10n=True))
 
diff --git a/mayan/apps/documents/statistics.py b/mayan/apps/documents/statistics.py
index 3569ee5eab..63f0bfba0e 100644
--- a/mayan/apps/documents/statistics.py
+++ b/mayan/apps/documents/statistics.py
@@ -1,9 +1,9 @@
 from __future__ import absolute_import, unicode_literals
 
+from django.db.models import Avg, Count, Max, Min
+from django.template.defaultfilters import filesizeformat
 from django.utils.translation import ugettext_lazy as _
-from django.db.models import Avg, Count, Min, Max
 
-from common.utils import pretty_size, pretty_size_10
 from statistics.classes import Statistic
 
 from .models import Document, DocumentType, DocumentPage, DocumentVersion
@@ -44,23 +44,27 @@ class DocumentStatistics(Statistic):
     def get_results(self):
         results = []
 
-        results.extend([
-            _('Document types: %d') % DocumentType.objects.count(),
-        ])
+        results.extend(
+            [
+                _('Document types: %d') % DocumentType.objects.count(),
+            ]
+        )
         document_stats = DocumentVersion.objects.annotate(
             page_count=Count('pages')
         ).aggregate(Min('page_count'), Max('page_count'), Avg('page_count'))
-        results.extend([
-            _(
-                'Minimum amount of pages per document: %d'
-            ) % (document_stats['page_count__min'] or 0),
-            _(
-                'Maximum amount of pages per document: %d'
-            ) % (document_stats['page_count__max'] or 0),
-            _(
-                'Average amount of pages per document: %f'
-            ) % (document_stats['page_count__avg'] or 0),
-        ])
+        results.extend(
+            [
+                _(
+                    'Minimum amount of pages per document: %d'
+                ) % (document_stats['page_count__min'] or 0),
+                _(
+                    'Maximum amount of pages per document: %d'
+                ) % (document_stats['page_count__max'] or 0),
+                _(
+                    'Average amount of pages per document: %f'
+                ) % (document_stats['page_count__avg'] or 0),
+            ]
+        )
 
         return results
 
@@ -71,23 +75,21 @@ class DocumentUsageStatistics(Statistic):
 
         total_db_documents = Document.objects.only('pk',).count()
 
-        results.extend([
-            _('Documents in database: %d') % total_db_documents,
-        ])
+        results.extend(
+            [
+                _('Documents in database: %d') % total_db_documents,
+            ]
+        )
 
         try:
             total_storage_documents, storage_used_space = storage_count()
-            results.append(_('Documents in storage: %d') %
-                           total_storage_documents)
+            results.append(
+                _('Documents in storage: %d') % total_storage_documents
+            )
             results.append(
                 _(
-                    'Space used in storage: %(base_2)s (base 2), %(base_10)s '
-                    '(base 10), %(bytes)d bytes'
-                ) % {
-                    'base_2': pretty_size(storage_used_space),
-                    'base_10': pretty_size_10(storage_used_space),
-                    'bytes': storage_used_space
-                }
+                    'Space used in storage: %s'
+                ) % filesizeformat(storage_used_space)
             )
         except NotImplementedError:
             pass
diff --git a/mayan/apps/documents/views.py b/mayan/apps/documents/views.py
index c00fb622b9..37ece0564a 100644
--- a/mayan/apps/documents/views.py
+++ b/mayan/apps/documents/views.py
@@ -8,6 +8,7 @@ from django.conf import settings
 from django.contrib import messages
 from django.core.exceptions import PermissionDenied
 from django.core.urlresolvers import resolve, reverse, reverse_lazy
+from django.template.defaultfilters import filesizeformat
 from django.http import HttpResponse, HttpResponseRedirect
 from django.shortcuts import render_to_response, get_object_or_404
 from django.template import RequestContext
@@ -21,7 +22,7 @@ from common.generics import (
     SingleObjectEditView, SingleObjectListView
 )
 from common.mixins import MultipleInstanceActionMixin
-from common.utils import pretty_size, render_date_object
+from common.utils import render_date_object
 from converter.literals import (
     DEFAULT_PAGE_NUMBER, DEFAULT_ROTATION, DEFAULT_ZOOM_LEVEL
 )
@@ -278,15 +279,15 @@ def document_properties(request, document_id):
         document_fields.extend([
             {
                 'label': _('File mimetype'),
-                'field': lambda x: x.file_mimetype or _('None')
+                'field': lambda x: document.file_mimetype or _('None')
             },
             {
                 'label': _('File encoding'),
-                'field': lambda x: x.file_mime_encoding or _('None')
+                'field': lambda x: document.file_mime_encoding or _('None')
             },
             {
                 'label': _('File size'),
-                'field': lambda x: pretty_size(x.size) if x.size else '-'
+                'field': lambda document: filesizeformat(document.size) if document.size else '-'
             },
             {'label': _('Exists in storage'), 'field': 'exists'},
             {'label': _('File path in storage'), 'field': 'latest_version.file'},