This is an observation of anomaly of the bilateral jugular veins system with regard to their formation, tributaries and drainage pattern. Both right and left external jugular veins drained into the internal jugular veins. The right internal jugular vein, after receiving anomalous tributaries drained into the subclavian veins to form the right brachiocephalic vein. The left internal jugular vein receives variant tributaries just before it joins the left brachiocephalic vein. Both the external jugular veins were larger than normal. Moreover, the left internal jugular vein was almost twice the size of the right internal jugular vein. The current observations are being reported for the first time. The anomalies reported in this observation involve most veins of the jugular system and therefore suggests that anomalies of a particular vein may affect the size and symmetry of veins that drain into it, or communicate with it.