--- a/virtualbox.rst	Sun Jul 01 10:43:41 2018 +0300
+++ b/virtualbox.rst	Wed Jul 04 21:16:15 2018 +0300
@@ -26,3 +26,16 @@
 
   $ VBoxManage startvm $NAME
 
+Resize box
+==========
+::
+
+   $ vboxmanage list -l hdds
+   $ vboxmanage modifyhd $UUID --resize $SIZE
+
+Resizing of VMDK image isn't supported, convert to VDI first::
+
+  $ vboxmanage clonehd $MY.vmdk $MY.vdi --format vdi
+  $ vboxmanage modifyhd $MY.vdi --resize $SIZE
+  $ vboxmanage clonehd $MY.vdi $MY.new.vmdk --format vmdk
+