diff --git a/geneit_app/src/widgets/simple_family_tree/SimpleFamilyTree.tsx b/geneit_app/src/widgets/simple_family_tree/SimpleFamilyTree.tsx
index 88e7eac..e3de815 100644
--- a/geneit_app/src/widgets/simple_family_tree/SimpleFamilyTree.tsx
+++ b/geneit_app/src/widgets/simple_family_tree/SimpleFamilyTree.tsx
@@ -6,12 +6,30 @@ import { getTextWidth } from "../../utils/render_utils";
 
 const FACE_WIDTH = 60;
 const FACE_HEIGHT = 70;
+
+/**
+ * Vertical space between faces and text
+ */
 const FACE_TEXT_SPACING = 2;
 
+/**
+ * Cards height
+ */
 const CARD_HEIGHT = 103;
+
+/**
+ * Space between spouse cards
+ */
 const SPOUSE_SPACING = 10;
-const CARD_SPACING = 20;
+
+/**
+ * Space between two siblings hierachy
+ */
 const SIBLINGS_SPACING = 20;
+
+/**
+ * Vertical space between two generations
+ */
 const LEVEL_SPACING = 25;
 
 const NAME_FONT = "13px Roboto";
@@ -106,7 +124,8 @@ function buildSimpleDownTreeNode(
 
   // Compute down level width
   const downWidth =
-    SIBLINGS_SPACING * node.down.length +
+    SIBLINGS_SPACING * node.down.length -
+    SIBLINGS_SPACING +
     node.down.reduce((prev, n) => prev + n.width, 0);
 
   node.parentWidth = levelWidth;