This set of pins was made by AB Emblems, the NASA contractor for mission emblems. Each is approximately 1 inch in diameter.

It is a complete set of all Space Shuttle missions flown in 2009. The missions included in this set are:

When purchasing NASA lapel pins always look for the embossing on the back of the pin:

[Mission Number]
NASA
ABemblem.com

to be sure you are getting the NASA authorized emblem from AB Emblems.