Prima Marketing MOULD-8856 Re-Design Mould 5"X8"X8mm-Curio Trinkets

Q: About what size is each trinket mould?

Not sure about 'exact' measurements, but through deduction, if the mold is 8" long, and the number of trinkets down one side is 6, my estimate is that each is approximately 1 1/8" to 1 1/4" in diameter. Hope this helps.

Q: Is the mold suitable for melted metal?

Oh wow. Good question. The only rubber I know that can handle, say, melted solder is red rubber like that you find in genuine red rubber stamps. I think some silicone is bakable or can handle the heat (like those you see for cakes and candy), but I'm not sure about silicone and melted metals. Hopefully, somebody can help you.