diff --git a/src/collections/sets.rs b/src/collections/sets.rs
index a93d6f8df3c732fd08608df15a18535fe90e6ab2..180e111d09091371b9da96f7d13f31de222d2722 100644
--- a/src/collections/sets.rs
+++ b/src/collections/sets.rs
@@ -106,6 +106,11 @@ impl<T: Eq> VecSet<T> {
         self.inner.is_empty()
     }
 
+    #[inline]
+    pub fn len(&self) -> usize {
+        return self.inner.len();
+    }
+
     #[inline]
     pub fn into_vec(self) -> Vec<T> {
         return self.inner;