How to make a Padded Dog Collar?

Hello community,

I have been thinking about making a padded dog collar.

Equus : https://www.equusleather.co.uk/canine/dog-collars/padded-plain-collar.html

My partner is in the equestrian world. So my first idea was to go on bridle leather (Sedgwick, Bakers...).

At least for the leather on the front.

But I imagine some people have already realized this. So here are some questions:

• What leather for the front? What thickness? ...

• Foam interlining? What thickness? ...

• What leather for the lining? What thickness? ...

• Any advice (e-shop, accessories ...)?

Thanks for your help.

Nice evening.