diff --git a/services/backup/src/Constants.h b/services/backup/src/Constants.h
--- a/services/backup/src/Constants.h
+++ b/services/backup/src/Constants.h
@@ -18,9 +18,9 @@
 // than the chunk limit, once we get the amount of data of size equal to the
 // limit, we wouldn't know if we should put this in the database right away or
 // wait for more data.
-// 400KB limit (KB, not KiB, that's why it's 1000 not 1024) -
+// 400KiB limit (in docs there is KB but they mean KiB) -
 // https://docs.aws.amazon.com/amazondynamodb/latest/developerguide/ServiceQuotas.html
-const size_t LOG_DATA_SIZE_DATABASE_LIMIT = 400 * 1000;
+const size_t LOG_DATA_SIZE_DATABASE_LIMIT = 1024 * 400;
 
 } // namespace network
 } // namespace comm
diff --git a/services/commtest/tests/lib/tools.rs b/services/commtest/tests/lib/tools.rs
--- a/services/commtest/tests/lib/tools.rs
+++ b/services/commtest/tests/lib/tools.rs
@@ -1,7 +1,10 @@
 use bytesize::ByteSize;
 
 #[allow(dead_code)]
-pub fn generate_nbytes(number_of_bytes: usize, predefined_byte_value: Option<u8>) -> Vec<u8> {
+pub fn generate_nbytes(
+  number_of_bytes: usize,
+  predefined_byte_value: Option<u8>,
+) -> Vec<u8> {
   let byte_value = predefined_byte_value.unwrap_or(b'A');
   return vec![byte_value; number_of_bytes];
 }
@@ -18,6 +21,11 @@
   TonicStatus(tonic::Status),
 }
 
+#[allow(dead_code)]
+pub fn get_dynamo_db_item_size_limit() -> usize {
+  ByteSize::kib(400).as_u64() as usize
+}
+
 pub const GRPC_METADATA_SIZE_BYTES: usize = 5;
 
 #[allow(dead_code)]