diff --git a/exam/ex.tex b/exam/ex.tex
index 33f8fd6..62951ed 100644
--- a/exam/ex.tex
+++ b/exam/ex.tex
@@ -223,7 +223,10 @@
       chosen with respect to an adversary using Information Set Decoding (ISD)
       to find a solution to the underlying hard problem.
 
-    \item \TODO
+    \item The size for ephemeral keys is $\unit[452]{bytes}$ (in memory) for the
+      private key and $\unit[1872]{bytes}$ for the public key. The size for
+      long-term keys is $\unit[468]{bytes}$ (in memory) for the private key and
+      $\unit[4488]{bytes}$ for the public key.
 
     \item \TODO