The Average Team trading pin size is 1.75"; 90% of teams order 1.50", 1.75" or 2.00"
  
1/2"                        0.50" pins are roughly the size of an M&M or Skittles candy

3/4"                        0.75" pins are roughly the size of a penny 

  1"                          1.00" pins are roughly the size of a quarter

1 1/4"                     1.25" pins are roughly the size of a half dollar

1 1/2"                     1.50" pins are roughly the size of an Eisenhower dollar

1 3/4"                     1.75" pins are roughly the diameter of a golf ball

   2"                          2.00" pins are roughly the size of the top of a small can of V8

2 1/4"                      2.25" pins are roughly the diameter of a racquetball or billiard ball

2 1/2"                      2.50" pins are roughly the diameter of a tennis ball

2 3/4"                      2.75" pins are roughly the diameter of an official MLB baseball

   3"                          3.00" pins are roughly the diameter of a hockey puck

3 1/4"                      3.25" pins are roughly the diameter of a 5-ounce can of tuna

3 1/2"                      3.50" pins are roughly the diameter of an 11" softball

3 3/4"                      3.75" pins are roughly the diameter of a 12" softball

   4"                          4.00" pins are roughly the diameter of a large McDonalds soft drink lid