diff --git a/math.hpp b/math.hpp
index 35e060d..30f6d39 100644
--- a/math.hpp
+++ b/math.hpp
@@ -5,9 +5,9 @@
 #define PIdiv2 PI/2
 
 
-const float shoulder_and_elbow_length = 125;
+const float shoulder_and_elbow_length = 12.5;
 const float shoulder_plus_elbow_length = shoulder_and_elbow_length * 2;
-const float wrist_length = 190;
+const float wrist_length = 19;
 
 class Vec2 {
 public: