First Special Service Force CANADA collar disc

[Bill A]

I recently acquired a CANADA collar disc, Scully marked, for the First Special Service Force. The Scully pattern has a somewhat obscure history, and it was not was issued to Forcemen during the FSSF's operational service. The disc was ordered, but the order cancelled. Some research suggests these were sold as private purchase.
There is the issue pattern of the collar disc, with two pieces, a separate Canada with a post on a plain circular collar. These were frequently worn as a cap badge.

[Bwetdude]

What's the dimension of the disc?

[Bill A]

Appears to be slightly more than 1 inch diameter. Maybe 1 1/32nd?