It's actually a little bit under 1/4" - our calipers say about 0.23". It's right about 2" long and 1" wide. Not sure what or if it's rated at, so don't trust anyone's life to it (unless you don't like them very much, I guess).
"Catch of the Day" Crappie Fish Fridge Magnet
"German" Sun und Dust Goggles
$100 Bill Tissue
(Almost) Unbreakable Rubber-Coated Bottle