diff --git a/boaapi/boa_client.py b/boaapi/boa_client.py
index 6e646df..3dc771c 100644
--- a/boaapi/boa_client.py
+++ b/boaapi/boa_client.py
@@ -394,3 +394,17 @@ def output(self, job):
             return self.server.job.output(job.id)
         except xmlrpc.client.Fault as e:
             raise BoaException(e).with_traceback(e.__traceback__)
+
+    def output_size(self, job):
+        """Return the output size for this job, if it finished successfully and has an output.
+
+        Raises:
+            BoaException: if theres an issue reading from the server
+        """
+        self.ensure_logged_in()
+        try:
+            if job.exec_status != "Finished":
+                return "Job is currently running"
+            return self.server.job.outputsize(job.id)
+        except xmlrpc.client.Fault as e:
+            raise BoaException(e).with_traceback(e.__traceback__)
diff --git a/boaapi/job_handle.py b/boaapi/job_handle.py
index 88a245e..767d05f 100644
--- a/boaapi/job_handle.py
+++ b/boaapi/job_handle.py
@@ -85,6 +85,10 @@ def output(self):
         """Return the output for this job, if it finished successfully and has output."""
         return self.client.output(self)
 
+    def output_size(self):
+        """Return the output size for this job, if it finished successfully and has output."""
+        return self.client.output_size(self)
+
     def refresh(self):
         """Refreshes the cached data for this job."""
         job = self.client.get_job(self.id)