diff --git a/CHANGELOG.md b/CHANGELOG.md
index e30c975de5..3afb376425 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -23,6 +23,7 @@
 - [#4579](https://github.com/blockscout/blockscout/pull/4579) - Write contract page: Resize inputs; Improve multiplier selector
 
 ### Fixes
+- [#4810](https://github.com/blockscout/blockscout/pull/4810) - Show `nil` block.size as `N/A bytes`
 - [#4798](https://github.com/blockscout/blockscout/pull/4798) - Token instance View contract icon Safari fix
 - [#4796](https://github.com/blockscout/blockscout/pull/4796) - Fix nil.timestamp issue
 - [#4764](https://github.com/blockscout/blockscout/pull/4764) - Add cleaning of substrings of `require` messages from parsed constructor arguments
diff --git a/apps/block_scout_web/lib/block_scout_web/templates/block/overview.html.eex b/apps/block_scout_web/lib/block_scout_web/templates/block/overview.html.eex
index 03849dd586..7943d5ea5d 100644
--- a/apps/block_scout_web/lib/block_scout_web/templates/block/overview.html.eex
+++ b/apps/block_scout_web/lib/block_scout_web/templates/block/overview.html.eex
@@ -107,7 +107,7 @@
               text: gettext("Size of the block in bytes.") %>
               <%= gettext("Size") %>
             </dt>
-            <dd class="col-sm-9 col-lg-10"><%= Cldr.Unit.new(:byte, @block.size) |> cldr_unit_to_string!() %></dd>
+            <dd class="col-sm-9 col-lg-10"><%= if !is_nil(@block.size), do: (Cldr.Unit.new(:byte, @block.size) |> cldr_unit_to_string!()), else: gettext("N/A bytes") %></dd>
           </dl>
           <!-- Hash -->
           <dl class="row">
diff --git a/apps/block_scout_web/priv/gettext/default.pot b/apps/block_scout_web/priv/gettext/default.pot
index b52e89db91..e388c07a48 100644
--- a/apps/block_scout_web/priv/gettext/default.pot
+++ b/apps/block_scout_web/priv/gettext/default.pot
@@ -3216,3 +3216,8 @@ msgstr ""
 #: lib/block_scout_web/templates/address_token/overview.html.eex:66
 msgid "Shows the total CRC balance in the address."
 msgstr ""
+
+#, elixir-format
+#: lib/block_scout_web/templates/block/overview.html.eex:110
+msgid "N/A bytes"
+msgstr ""
diff --git a/apps/block_scout_web/priv/gettext/en/LC_MESSAGES/default.po b/apps/block_scout_web/priv/gettext/en/LC_MESSAGES/default.po
index aa62599504..e388c07a48 100644
--- a/apps/block_scout_web/priv/gettext/en/LC_MESSAGES/default.po
+++ b/apps/block_scout_web/priv/gettext/en/LC_MESSAGES/default.po
@@ -3212,7 +3212,12 @@ msgstr ""
 msgid "CRC Worth"
 msgstr ""
 
-#, elixir-format, fuzzy
+#, elixir-format
 #: lib/block_scout_web/templates/address_token/overview.html.eex:66
 msgid "Shows the total CRC balance in the address."
 msgstr ""
+
+#, elixir-format
+#: lib/block_scout_web/templates/block/overview.html.eex:110
+msgid "N/A bytes"
+msgstr ""