Neptune 1.55 m (5 ft 1 in) average 6th grade boy 144.4 km (89.7 mi) Newark, Delaware Calais , France Nelson Bay, New South Wales Pluto 7 cm (3 in) baseball 190 km (118 mi) Wildwood, New Jersey Saint-Valery-sur-Somme , France Bulahdelah, New South Wales Eris 8 cm (3 in) billiard