diff --git a/src/root.zig b/src/root.zig
index ea810d0..976356e 100644
--- a/src/root.zig
+++ b/src/root.zig
@@ -362,6 +362,10 @@ pub fn Range(comptime T: type, end_type: RangeEndType) type {
             defer self.current += 1;
             return self.current;
         }
+
+        pub fn sizeHint(self: *const Self) usize {
+            return self.end - self.current + @intFromBool(end_type == .inclusive);
+        }
     };
 }