diff --git a/tutorial/ouce2013/rrd-by-example/ex/rrd-size.txt b/tutorial/ouce2013/rrd-by-example/ex/rrd-size.txt
--- /dev/null
@@ -0,0 +1,7 @@
+DSs: 1 RRA Row: 1 RRAs: 1 == 552 byte
+DSs: 2 RRA Row: 1 RRAs: 1 == 872 byte
+DSs: 1 RRA Row: 2 RRAs: 1 == 560 byte
+DSs: 1 RRA Row: 1 RRAs: 2 == 752 byte
++1 DS: 320 byte
++1 RRA Row: 8 byte
++1 RRA: 200 byte