The smaller your punch hole, the wider the band. A larger punch hole will produce more of a womens size ring. Here's how to get a 1/4" punch hole onto your mandrel.
No fancy tools coin ring - • Make Rings out of Coins
Annealing your coin. How hot is too hot? • Annealing Coin RIngs - How Hot is too Hot?
Drift Pin Set - https://www.amazon.com/ATD-Tools-759-...
Deluxe Coin Punch - https://www.etsy.com/listing/21463121...
Cheaper Coin Punch - https://www.etsy.com/listing/53037857...
Compression Dies - https://www.etsy.com/listing/27457146...
Folding Cones - https://www.etsy.com/listing/25905304...
Rubber Sanding Mandrels - https://www.etsy.com/listing/26737091...
Shaping Mandrel - https://www.riogrande.com/Product/Dur...