diff --git a/boxtree/traversal.py b/boxtree/traversal.py
index c42189d833d2243048b0fac62aec88fb7f38e3bc..f7e7045ede4f1b3e29738b7012c0f7e49863e2ff 100644
--- a/boxtree/traversal.py
+++ b/boxtree/traversal.py
@@ -1364,6 +1364,14 @@ class FMMTraversalInfo(DeviceDataRecord):
 
         An instance of :class:`boxtree.Tree`.
 
+    .. attribute:: nboxes
+
+        Number of boxe in the tree.
+
+    .. attribute:: nlevels
+
+        Number of levels in the tree.
+
     .. attribute:: well_sep_is_n_away
 
         The distance (measured in target box diameters in the :math:`l^\infty`
@@ -1388,6 +1396,10 @@ class FMMTraversalInfo(DeviceDataRecord):
         If :attr:`boxtree.Tree.sources_are_targets`,
         then ``target_boxes is source_boxes``.
 
+    .. attribute:: ntarget_boxes
+
+        Number of :attr:`target_boxes`.
+
     .. attribute:: source_parent_boxes
 
         ``box_id_t [*]``
@@ -1667,6 +1679,18 @@ class FMMTraversalInfo(DeviceDataRecord):
 
     # }}}
 
+    @property
+    def nboxes(self):
+        return self.tree.nboxes
+
+    @property
+    def nlevels(self):
+        return self.tree.nlevels
+
+    @property
+    def ntarget_boxes(self):
+        return len(self.target_boxes)
+
     @property
     def ntarget_or_target_parent_boxes(self):
         return len(self.target_or_target_parent_boxes)