Thickness of a Happy Mouth snaffle?

[swgarasu]

I'm wondering if anyone knows the thickness (in mm) of a Happymouth snaffle? I've had 2 of the eggbutts and I'm looking to try getting horsey in a metal bit as after a year or so they are getting fairly beat up, but I'd like to order something with a similar thickness.

[scubed]

They are on the thinner side, I would say equivalent to a 16mm snaffle