diff --git a/format.go b/format.go
index 54cd5f8..3e47789 100644
--- a/format.go
+++ b/format.go
@@ -459,6 +459,7 @@ func (h *DefaultEventHandler) OnReceiveHeaders(md metadata.MD) {
 func (h *DefaultEventHandler) OnReceiveResponse(resp proto.Message) {
 	h.NumResponses++
 	if h.verbose {
+		fmt.Fprintf(h.out, "\nResponse size (bytes): %d\n", proto.Size(resp))
 		fmt.Fprint(h.out, "\nResponse contents:\n")
 	}
 	if respStr, err := h.formatter(resp); err != nil {
diff --git a/go.sum b/go.sum
index 6e6a698..db7617f 100644
--- a/go.sum
+++ b/go.sum
@@ -444,6 +444,7 @@ golang.org/x/sys v0.0.0-20200202164722-d101bd2416d5/go.mod h1:h1NjWce9XRLGQEsW7w
 golang.org/x/sys v0.0.0-20200212091648-12a6c2dcc1e4/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200223170610-d5e6a3e2c0ae/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/sys v0.0.0-20200323222414-85ca7c5b95cd/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
+golang.org/x/sys v0.0.0-20200331124033-c3d80250170d h1:nc5K6ox/4lTFbMVSL9WRR81ixkcwXThoiF6yf+R9scA=
 golang.org/x/sys v0.0.0-20200331124033-c3d80250170d/go.mod h1:h1NjWce9XRLGQEsW7wpKNCjG9DtNlClVuFLEZdDNbEs=
 golang.org/x/text v0.0.0-20170915032832-14c0d48ead0c/go.mod h1:NqM8EUOU14njkJ3fqMW+pc6Ldnwhi/IjpwHt7yyuwOQ=
 golang.org/x/text v0.3.0 h1:g61tztE5qeGQ89tm6NTjjM9VPIm088od1l6aSorWRWg=