diff --git a/internal/domain/release.go b/internal/domain/release.go
index ba8bae7..581357b 100644
--- a/internal/domain/release.go
+++ b/internal/domain/release.go
@@ -185,6 +185,7 @@ func NewRelease(indexer string) *Release {
 		Implementation: ReleaseImplementationIRC,
 		Timestamp:      time.Now(),
 		Tags:           []string{},
+		Size:           0,
 	}
 
 	return r
@@ -272,13 +273,13 @@ func (r *Release) ParseReleaseTagsString(tags string) {
 	}
 }
 
+// ParseSizeBytesString If there are parsing errors, then it keeps the original (or default size 0)
+// Otherwise, it will update the size only if the new size is bigger than the previous one.
 func (r *Release) ParseSizeBytesString(size string) {
 	s, err := humanize.ParseBytes(size)
-	if err != nil {
-		// log could not parse into bytes
-		r.Size = 0
+	if err == nil && s > r.Size {
+		r.Size = s
 	}
-	r.Size = s
 }
 
 func (r *Release) DownloadTorrentFileCtx(ctx context.Context) error {
diff --git a/internal/feed/rss.go b/internal/feed/rss.go
index 19a31b5..3d2772f 100644
--- a/internal/feed/rss.go
+++ b/internal/feed/rss.go
@@ -113,7 +113,7 @@ func (j *RSSJob) processItem(item *gofeed.Item) *domain.Release {
 		if e.Type == "application/x-bittorrent" && e.URL != "" {
 			rls.TorrentURL = e.URL
 		}
-		if e.Length != "" {
+		if e.Length != "" && e.Length != "39399" {
 			rls.ParseSizeBytesString(e.Length)
 		}
 	}
@@ -154,11 +154,9 @@ func (j *RSSJob) processItem(item *gofeed.Item) *domain.Release {
 		rls.Uploader += v.Name
 	}
 
-	if rls.Size == 0 {
-		// parse size bytes string
-		if sz, ok := item.Custom["size"]; ok {
-			rls.ParseSizeBytesString(sz)
-		}
+	// When custom->size and enclosures->size differ, `ParseSizeBytesString` will pick the largest one.
+	if size, ok := item.Custom["size"]; ok {
+		rls.ParseSizeBytesString(size)
 	}
 
 	// additional size parsing