im sorry~i have no idea and no way of "measuring" it either, I would say its about the thickness of like three leads out of a pencil, if that helps at all. sorry..
haha~yea, my little 5 year old came up to my desk last night and "tried" to take it, he said he wanted to wear it, I tried to explain to him that even tho no one has won it "technically" yet, that it doesn't belong to us anymore, he didn't care! LOL! he wanted to wear it, SOOO~I ended up having to give up one of my gold chains for him to wear so he would leave this one alone! UGH! KIDS! what do ppl do that have 6 -7 kids? I'd flip my wig I think! HAHA! but, can't help but love em to death they are soo cute! Take care! and hope you win!