All of these are associated with different sports-played at national or international level. Simply identify the sport and to what the measurement refers.Eg ..8 feet... Association football.Height of the crossbar..OK here we go... 1....41/4 inches 2....51/2 ounces 3....38-44 pounds 4....1.68 inches 5....91/4 inches 6....10 feet 7....9 feet 71/2 inches 8....14-16 ounces 9....2.7 grammes 10..50mtrs x 50mtrs Apologies for mixing imperial and metric...have fun...if this isnt enough, there is more......lol