diff --git a/local/recipes/tui/tlc/source/src/filemanager/render.rs b/local/recipes/tui/tlc/source/src/filemanager/render.rs
index e5507a866c..6cb59f3203 100644
--- a/local/recipes/tui/tlc/source/src/filemanager/render.rs
+++ b/local/recipes/tui/tlc/source/src/filemanager/render.rs
@@ -559,6 +559,24 @@ impl FileManager {
                     Style::default().fg(self.theme.accent).bg(panel_bg),
                 ));
             }
+            // Marked-file total size: sum of stat.size for every
+            // entry whose name is in the marked set. Shown only when
+            // at least one file is marked. Directories are counted.
+            if panel.marked_count() > 0 {
+                let marked_set: std::collections::HashSet<String> =
+                    panel.marked_names().into_iter().collect();
+                let total: u64 = panel
+                    .entries()
+                    .iter()
+                    .filter(|e| marked_set.contains(&e.name))
+                    .map(|e| e.stat.size)
+                    .sum();
+                footer_spans.push(Span::raw(" "));
+                footer_spans.push(Span::styled(
+                    format!("Σ {}", format_utils::format_size(total)),
+                    Style::default().fg(self.theme.info).bg(panel_bg),
+                ));
+            }
             let total_w = footer_spans.iter().map(|s| s.width() as u16).sum::<u16>();
             if total_w < inner.width {
                 let pad = inner.width - total_w;