diff --git a/CHANGELOG.md b/CHANGELOG.md
index 1857a3f1..c8574782 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -14,6 +14,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ### Fixed
 
 - Corrected eFuse BLOCK0 definitions for ESP32-C2, ESP32-C3, and ESP32-S3 (#961)
+- Corrected eFuse block sizes for ESP32-C2, ESP32-C3, and ESP32-S3 (#964)
 
 ### Removed
 
diff --git a/espflash/src/target/efuse/esp32c2.rs b/espflash/src/target/efuse/esp32c2.rs
index 12a19be5..66288379 100644
--- a/espflash/src/target/efuse/esp32c2.rs
+++ b/espflash/src/target/efuse/esp32c2.rs
@@ -10,7 +10,7 @@
 use super::EfuseField;
 
 /// Total size in bytes of each block
-pub(crate) const BLOCK_SIZES: &[u32] = &[8, 11, 32, 32];
+pub(crate) const BLOCK_SIZES: &[u32] = &[12, 12, 32, 32];
 
 /// Disable programming of individual eFuses
 pub const WR_DIS: EfuseField = EfuseField::new(0, 0, 0, 8);
diff --git a/espflash/src/target/efuse/esp32c3.rs b/espflash/src/target/efuse/esp32c3.rs
index 3e570423..7eb77c80 100644
--- a/espflash/src/target/efuse/esp32c3.rs
+++ b/espflash/src/target/efuse/esp32c3.rs
@@ -10,7 +10,7 @@
 use super::EfuseField;
 
 /// Total size in bytes of each block
-pub(crate) const BLOCK_SIZES: &[u32] = &[23, 24, 32, 32, 32, 32, 32, 32, 32, 32, 32];
+pub(crate) const BLOCK_SIZES: &[u32] = &[24, 24, 32, 32, 32, 32, 32, 32, 32, 32, 32];
 
 /// Disable programming of individual eFuses
 pub const WR_DIS: EfuseField = EfuseField::new(0, 0, 0, 32);
diff --git a/espflash/src/target/efuse/esp32s3.rs b/espflash/src/target/efuse/esp32s3.rs
index 1050a6b3..d9725d7e 100644
--- a/espflash/src/target/efuse/esp32s3.rs
+++ b/espflash/src/target/efuse/esp32s3.rs
@@ -10,7 +10,7 @@
 use super::EfuseField;
 
 /// Total size in bytes of each block
-pub(crate) const BLOCK_SIZES: &[u32] = &[23, 24, 32, 32, 32, 32, 32, 32, 32, 32, 32];
+pub(crate) const BLOCK_SIZES: &[u32] = &[24, 24, 32, 32, 32, 32, 32, 32, 32, 32, 32];
 
 /// Disable programming of individual eFuses
 pub const WR_DIS: EfuseField = EfuseField::new(0, 0, 0, 32);