Think its fixed now

src/me/libraryaddict/disguise/utilities/DisguiseValues.java

@@ -45,6 +45,7 @@ public class DisguiseValues {
 
     private FakeBoundingBox adultBox;
     private FakeBoundingBox babyBox;
+    private float[] entitySize;
     private int enumEntitySize;
     private HashMap<Integer, Object> metaValues = new HashMap<Integer, Object>();
     private Class nmsEntityClass;
@@ -63,6 +64,10 @@ public class DisguiseValues {
         return babyBox;
     }
 
+    public float[] getEntitySize() {
+        return entitySize;
+    }
+
     public int getEntitySize(double paramDouble) {
         double d = paramDouble - (((int) Math.floor(paramDouble)) + 0.5D);
 
@@ -123,6 +128,10 @@ public class DisguiseValues {
         babyBox = newBox;
     }
 
+    public void setEntitySize(float[] size) {
+        this.entitySize = size;
+    }
+
     public void setMetaValue(int no, Object value) {
         metaValues.put(no, value);
     }