diff --git a/ouroboros-consensus-cardano/changelog.d/20240808_125131_marcin.wojtowicz_tx_wire_size.md b/ouroboros-consensus-cardano/changelog.d/20240808_125131_marcin.wojtowicz_tx_wire_size.md
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+<!--
+A new scriv changelog fragment.
+
+Uncomment the section that is right (remove the HTML comment wrapper).
+-->
+
+<!--
+### Patch
+
+- A bullet item for the Patch category.
+
+-->
+<!--
+### Non-Breaking
+
+- A bullet item for the Non-Breaking category.
+
+-->
+### Breaking
+
+- Implement wireTxSize of LedgerSupportsMempool instantiations for Byron and Shelley
+
diff --git a/ouroboros-consensus-diffusion/changelog.d/20240808_125632_marcin.wojtowicz_tx_wire_size.md b/ouroboros-consensus-diffusion/changelog.d/20240808_125632_marcin.wojtowicz_tx_wire_size.md
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+<!--
+A new scriv changelog fragment.
+
+Uncomment the section that is right (remove the HTML comment wrapper).
+-->
+
+<!--
+### Patch
+
+- A bullet item for the Patch category.
+
+-->
+
+### Non-Breaking
+
+- Pass wireTxSize binding to txSubmission{Inbound, Outbound} which
+  enables transaction submission handlers to conveniently work with
+  sizes of byte encoded transactions for network dissemination.
+
+<!--
+### Breaking
+
+- A bullet item for the Breaking category.
+
+-->
diff --git a/ouroboros-consensus/changelog.d/20240808_101916_marcin.wojtowicz_tx_wire_size.md b/ouroboros-consensus/changelog.d/20240808_101916_marcin.wojtowicz_tx_wire_size.md
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+++ b/ouroboros-consensus/changelog.d/20240808_101916_marcin.wojtowicz_tx_wire_size.md
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+<!--
+A new scriv changelog fragment.
+
+Uncomment the section that is right (remove the HTML comment wrapper).
+-->
+
+<!--
+### Patch
+
+- A bullet item for the Patch category.
+
+-->
+<!--
+### Non-Breaking
+
+- A bullet item for the Non-Breaking category.
+
+-->
+### Breaking
+
+- Added txWireSize method to LedgerSupportsMempool to provide
+  a CBOR-encoded transaction size as it is when transmitted
+  over the network.