diff --git a/endpoints/v1/registry.py b/endpoints/v1/registry.py
index 543a8f4c2..f0bcc11b8 100644
--- a/endpoints/v1/registry.py
+++ b/endpoints/v1/registry.py
@@ -199,8 +199,10 @@ def put_image_layer(namespace, repository, image_id):
     try:
       start_time = time()
       store.stream_write(locations, path, sr)
+      metric_queue.chunk_size.Observe(size_info.compressed_size,
+                                      labelvalues=[list(locations)[0]])
       metric_queue.chunk_upload_time.Observe(time() - start_time,
-                         labelvalues=[size_info.compressed_size, list(locations)[0]])
+                         labelvalues=[list(locations)[0]])
     except IOError:
       logger.exception('Exception when writing image data')
       abort(520, 'Image %(image_id)s could not be written. Please try again.', image_id=image_id)
diff --git a/util/metrics/metricqueue.py b/util/metrics/metricqueue.py
index caf065ea5..5dba0ea97 100644
--- a/util/metrics/metricqueue.py
+++ b/util/metrics/metricqueue.py
@@ -73,9 +73,13 @@ class MetricQueue(object):
                                                           labelnames=['namespace', 'repo_name',
                                                                       'status', 'executor'])
 
+    self.chunk_size = prom.create_histogram('chunk_size',
+                                            'Registry blob chunk size',
+                                            labelnames=['storage_region'])
+
     self.chunk_upload_time = prom.create_histogram('chunk_upload_time',
                                                    'Registry blob chunk upload time',
-                                                   labelnames=['chunk_size', 'storage_region'])
+                                                   labelnames=['storage_region'])
 
     self.authentication_count = prom.create_counter('authenication_count',
                                                     'Authentication count',