Any info on Anzac "A" badges

[Donny B.]

Can anyone give me some information on the Anzac "A" shoulder badges? I have had a couple in my collection for some time, that I am sure are correct.....I have seen others that were very dodgy, having only one lug, etc, some with the appearance of having been cut from a Royal Artillery shoulder title......which measure 20mm in height. I have just come across one that looks pretty good, has the two lugs and so on, but it only measures 15mm in height. I have a feeling that I read somewhere about there being a smaller "A" that was correct. Is this likely? Any information on these badges would be appreciated.

I can post photos if they would be helpful.

Donny B.