This is a 3/4" circular pin  Back in the early to mid - 1960's, Guy's Portato Chips inserted these in their products.  The pin in the scan is the exact one you are considering.     
Should you have any questions, feel free to contact me. 

Condition:
This is a 3/4" metal pin.  Not so large that it looks gaudy, but big enough to show your team spirit.  Just, outrageously cool.  Honestly, I wouldn't offer it for sale at this price if I didn't think it is well worth at least this amount.

Shipping Information:
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Click "Buy It Now" and add this to your collection.

Thank You!

sj/ob