I have a few 1g and 0.5g gold coins, mostly from Perth mint and RAM. They are tiny- I think they need 12mm capsules but I can’t find these for sale without the foam rings. If anyone knows where to purchase these please let me know.
You can get 1/20 , 14 mm capsules. otherwise use 2x2 sleeves "Matrix", Coin sheets. plastic sleeve like panda. Mylar Flip. The original 0.5g gold all comes with foam. and they all sticked glue to the coin over period.
I think smallest is 1/25…those baby dinkum ones…I hv those but not just the capsule…I hv after market 1/20 capsules…if interested..