diff --git a/libs/jwst-storage/src/storage/blobs/local_db.rs b/libs/jwst-storage/src/storage/blobs/local_db.rs
index 78e2044a..538fbace 100644
--- a/libs/jwst-storage/src/storage/blobs/local_db.rs
+++ b/libs/jwst-storage/src/storage/blobs/local_db.rs
@@ -1,4 +1,5 @@
 use jwst::{Base64Engine, URL_SAFE_ENGINE};
+use jwst_storage_migration::Alias;
 use sha2::{Digest, Sha256};
 
 use super::{utils::get_hash, *};
@@ -79,7 +80,7 @@ impl BlobDBStorage {
         Blobs::find()
             .filter(BlobColumn::WorkspaceId.is_in(workspaces))
             .select_only()
-            .column_as(BlobColumn::Length.sum(), "size")
+            .column_as(BlobColumn::Length.sum().cast_as(Alias::new("bigint")), "size")
             .into_tuple::<Option<i64>>()
             .one(&self.pool)
             .await
diff --git a/libs/jwst-storage/src/storage/blobs/mod.rs b/libs/jwst-storage/src/storage/blobs/mod.rs
index 9380561a..18baef57 100644
--- a/libs/jwst-storage/src/storage/blobs/mod.rs
+++ b/libs/jwst-storage/src/storage/blobs/mod.rs
@@ -416,6 +416,8 @@ mod tests {
         let storage = BlobAutoStorage::init_pool("sqlite::memory:").await.unwrap();
         Migrator::up(&storage.pool, None).await.unwrap();
 
+        assert_eq!(storage.get_blobs_size(vec!["blob".into()]).await.unwrap(), 0);
+
         let blob = Vec::from_iter((0..100).map(|_| rand::random()));
 
         let stream = async { Bytes::from(blob.clone()) }.into_stream();
@@ -437,6 +439,10 @@ mod tests {
                 .size as usize,
             blob.len()
         );
+        assert_eq!(
+            storage.get_blobs_size(vec!["blob".into()]).await.unwrap(),
+            blob.len() as i64
+        );
 
         // optimize must failed if blob not supported
         assert!(storage
@@ -554,8 +560,8 @@ mod tests {
             .is_err());
 
         assert_eq!(
-            storage.get_blobs_size(vec!["blob".into()]).await.unwrap() as usize,
-            100 + image.len()
+            storage.get_blobs_size(vec!["blob".into()]).await.unwrap(),
+            (blob.len() + image.len()) as i64
         );
 
         assert!(storage.delete_blob(Some("blob".into()), hash2.clone()).await.unwrap());
@@ -583,5 +589,32 @@ mod tests {
             storage.list_blobs(Some("not_exists_workspace".into())).await.unwrap(),
             Vec::<String>::new()
         );
+
+        {
+            let blob = Vec::from_iter((0..100).map(|_| rand::random()));
+            let stream = async { Bytes::from(blob.clone()) }.into_stream();
+            storage.put_blob_stream(Some("blob1".into()), stream).await.unwrap();
+
+            assert_eq!(
+                storage
+                    .get_blobs_size(vec!["blob".into(), "blob1".into()])
+                    .await
+                    .unwrap() as usize,
+                200
+            );
+        }
+
+        // test calc with not exists workspaces
+        {
+            assert_eq!(
+                storage
+                    .get_blobs_size(vec!["blob".into(), "blob1".into(), "blob2".into()])
+                    .await
+                    .unwrap(),
+                200
+            );
+
+            assert_eq!(storage.get_blobs_size(vec!["blob2".into()]).await.unwrap(), 0);
+        }
     }
 }