diff --git a/route/route.go b/route/route.go
index b74572f..eec4dd4 100644
--- a/route/route.go
+++ b/route/route.go
@@ -53,9 +53,13 @@ func HandleList(c *fiber.Ctx) error {
 
 		entries := make([]html.Entry, 0, len(config.Config.ServeDirs))
 		for _, key := range keys {
+			dirEntrySize, err := RecursivelyGetSize(config.Config.ServeDirs[key])
+			if err != nil {
+				return c.Status(fiber.StatusInternalServerError).SendString(err.Error())
+			}
 			entries = append(entries, html.Entry{
 				Name:  key,
-				Size:  -1,
+				Size:  dirEntrySize,
 				IsDir: true,
 			})
 		}