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This is a cool little Rebel pin designed for the band of a hat.
The space between the logo and the back clip is 1mm, with a bump at the end so it will snugly fit on a 1mm thick piece of leather without having to fear it will fall off.
You can likely use it on other materials or thicknesses, you can probably even sew it onto stuff or use it as a lapel pin. Just keep in mind that it was designed to slide onto a 1mm thick piece of leather.