diff --git a/bin/swift-bench b/bin/swift-bench
index 120f2a5..df0e404 100755
--- a/bin/swift-bench
+++ b/bin/swift-bench
@@ -35,6 +35,8 @@ CONF_DEFAULTS = {
     'del_concurrency': '10',
     'concurrency': '',
     'object_size': '1',
+    'lower_object_size': '10',
+    'upper_object_size': '10',
     'num_objects': '1000',
     'num_gets': '10000',
     'delete': 'yes',
diff --git a/swift/common/bench.py b/swift/common/bench.py
index 097b6fd..6a0af88 100644
--- a/swift/common/bench.py
+++ b/swift/common/bench.py
@@ -66,6 +66,8 @@ class Bench(object):
 
         self.object_size = int(conf.object_size)
         self.object_sources = conf.object_sources
+        self.lower_object_size = int(conf.lower_object_size)
+        self.upper_object_size = int(conf.upper_object_size)
         self.files = []
         if self.object_sources:
             self.object_sources = self.object_sources.split()
@@ -228,6 +230,9 @@ class BenchPUT(Bench):
         name = uuid.uuid4().hex
         if self.object_sources:
             source = random.choice(self.files)
+        elif self.upper_object_size > self.lower_object_size:
+            source = '0' * random.randint(self.lower_object_size,
+                        self.upper_object_size)
         else:
             source = '0' * self.object_size
         device = random.choice(self.devices)