diff --git a/libmproxy/console/common.py b/libmproxy/console/common.py
index ba6ba5b0c..b920a11fe 100644
--- a/libmproxy/console/common.py
+++ b/libmproxy/console/common.py
@@ -7,6 +7,7 @@ import os
 from .. import utils
 from ..protocol.http import CONTENT_MISSING, decoded
 from . import signals
+import netlib.utils
 
 try:
     import pyperclip
@@ -379,7 +380,7 @@ def format_flow(f, focus, extended=False, hostheader=False, padding=2):
     )
     if f.response:
         if f.response.content:
-            contentdesc = utils.pretty_size(len(f.response.content))
+            contentdesc = netlib.utils.pretty_size(len(f.response.content))
         elif f.response.content == CONTENT_MISSING:
             contentdesc = "[content missing]"
         else:
diff --git a/libmproxy/console/contentview.py b/libmproxy/console/contentview.py
index 454c992f8..aafba4d77 100644
--- a/libmproxy/console/contentview.py
+++ b/libmproxy/console/contentview.py
@@ -60,7 +60,7 @@ def trailer(clen, txt, limit):
         txt.append(
             urwid.Text(
                 [
-                    ("highlight", "... %s of data not shown. Press "%utils.pretty_size(rem)),
+                    ("highlight", "... %s of data not shown. Press "%netlib.utils.pretty_size(rem)),
                     ("key", "f"),
                     ("highlight", " to load all data.")
                 ]
diff --git a/libmproxy/console/statusbar.py b/libmproxy/console/statusbar.py
index 5455ad6ee..37ceef946 100644
--- a/libmproxy/console/statusbar.py
+++ b/libmproxy/console/statusbar.py
@@ -1,8 +1,8 @@
-import time
 import os.path
 
 import urwid
 
+import netlib.utils
 from . import pathedit, signals, common
 from .. import utils
 
@@ -22,7 +22,6 @@ class ActionBar(urwid.WidgetWrap):
         self.onekey = False
         self.pathprompt = False
 
-
     def sig_message(self, sender, message, expire=None):
         w = urwid.Text(message)
         self._w = w
@@ -191,7 +190,7 @@ class StatusBar(urwid.WidgetWrap):
             opts.append("following")
         if self.master.stream_large_bodies:
             opts.append(
-                "stream:%s" % utils.pretty_size(
+                "stream:%s" % netlib.utils.pretty_size(
                     self.master.stream_large_bodies.max_size
                 )
             )
diff --git a/libmproxy/dump.py b/libmproxy/dump.py
index 59e46dbbb..ac9c273f1 100644
--- a/libmproxy/dump.py
+++ b/libmproxy/dump.py
@@ -207,7 +207,7 @@ class DumpMaster(flow.FlowMaster):
             if f.response.content == http.CONTENT_MISSING:
                 sz = "(content missing)"
             else:
-                sz = utils.pretty_size(len(f.response.content))
+                sz = netlib.utils.pretty_size(len(f.response.content))
             print(" << %s %s" % (str_response(f.response), sz), file=self.outfile)
             self._print_message(f.response)
 
diff --git a/libmproxy/protocol/http.py b/libmproxy/protocol/http.py
index 852ce393f..8d703786b 100644
--- a/libmproxy/protocol/http.py
+++ b/libmproxy/protocol/http.py
@@ -691,7 +691,10 @@ class HTTPResponse(HTTPMessage):
         return f
 
     def __repr__(self):
-        size = utils.pretty_size(len(self.content)) if self.content else "content missing"
+        if self.content:
+            size = netlib.utils.pretty_size(len(self.content))
+        else:
+            size = "content missing"
         return "<HTTPResponse: {code} {msg} ({contenttype}, {size})>".format(
             code=self.code,
             msg=self.msg,
diff --git a/libmproxy/utils.py b/libmproxy/utils.py
index 02e8403bf..7d0e369bf 100644
--- a/libmproxy/utils.py
+++ b/libmproxy/utils.py
@@ -96,20 +96,6 @@ def multipartdecode(hdrs, content):
         return r
     return []
 
-def pretty_size(size):
-    suffixes = [
-        ("B",   2**10),
-        ("kB",   2**20),
-        ("MB",   2**30),
-    ]
-    for suf, lim in suffixes:
-        if size >= lim:
-            continue
-        else:
-            x = round(size/float(lim/2**10), 2)
-            if x == int(x):
-                x = int(x)
-            return str(x) + suf
 
 def pretty_duration(secs):
     formatters = [
@@ -124,6 +110,7 @@ def pretty_duration(secs):
     #less than 1 sec
     return "{:.0f}ms".format(secs*1000)
 
+
 class Data:
     def __init__(self, name):
         m = __import__(name)
diff --git a/test/test_utils.py b/test/test_utils.py
index ea38b9a36..6b9262a04 100644
--- a/test/test_utils.py
+++ b/test/test_utils.py
@@ -1,5 +1,5 @@
 import json
-from libmproxy import utils, flow
+from libmproxy import utils
 from netlib import odict
 import tutils
 
@@ -9,9 +9,11 @@ utils.CERT_SLEEP_TIME = 0
 def test_format_timestamp():
     assert utils.format_timestamp(utils.timestamp())
 
+
 def test_format_timestamp_with_milli():
     assert utils.format_timestamp_with_milli(utils.timestamp())
 
+
 def test_isBin():
     assert not utils.isBin("testing\n\r")
     assert utils.isBin("testing\x01")
@@ -31,13 +33,6 @@ def test_clean_hanging_newline():
     assert utils.clean_hanging_newline("foo") == "foo"
 
 
-def test_pretty_size():
-    assert utils.pretty_size(100) == "100B"
-    assert utils.pretty_size(1024) == "1kB"
-    assert utils.pretty_size(1024 + (1024/2.0)) == "1.5kB"
-    assert utils.pretty_size(1024*1024) == "1MB"
-
-
 def test_pkg_data():
     assert utils.pkg_data.path("console")
     tutils.raises("does not exist", utils.pkg_data.path, "nonexistent")
@@ -135,7 +130,7 @@ def test_parse_size():
 def test_parse_content_type():
     p = utils.parse_content_type
     assert p("text/html") == ("text", "html", {})
-    assert p("text") == None
+    assert p("text") is None
 
     v = p("text/html; charset=UTF-8")
     assert v == ('text', 'html', {'charset': 'UTF-8'})
@@ -146,4 +141,4 @@ def test_safe_subn():
 
 
 def test_urlencode():
-    assert utils.urlencode([('foo','bar')])
+    assert utils.urlencode([('foo', 'bar')])