diff --git a/doc/design/p2p_protocol/comment_4_94fff4c163de15cdad2030ac072b19ae._comment b/doc/design/p2p_protocol/comment_4_94fff4c163de15cdad2030ac072b19ae._comment
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+[[!comment format=mdwn
+ username="Ilya_Shlyakhter"
+ avatar="http://cdn.libravatar.org/avatar/1647044369aa7747829c38b9dcc84df0"
+ subject="re: key content size"
+ date="2019-04-01T17:44:29Z"
+ content="""
+Most keys do include the size of the content as part of the key: see [[internals/key_format]], [[git-annex-examinekey]].
+"""]]