Thanks for the support. Everyone's feedback is helping me immensely. I have more or less decided on making a few of each type, but what types people have expressed interest with will certainly be taken into account. Since each bar is a little bit different anyway, that just means that when I go to sell them, I'll list what I have individually, so people can pick which they'd like themselves.
As for the holograms, I'm going with a simple hologram with just the Garlic logo and a number in the order I produce them on it. I'll worry about fancy holograms in the future if I move forward making a SaltySpitoon line of cast physical coins. I actually dislike holograms the most on metal because I think they look kind of cheap/tacky, however as far as functionality goes, they work great so that you can show off your collection without someone taking your keys undetected. I'm leaning towards a 0.5x0.5 inch square shape for the smallest footprint, but circles are a bit more forgiving for when you decide to place them, so maybe a 0.5 or 0.75 inch circle instead. Paper wallets don't take up a lot of space (I've got a few ~ the size of a pea) but every producer on the market uses 1 inch or larger circle holograms. If anyone has opened a few Cas coins or similar, do you have any idea why the need for the excessively large holograms? As far as I can tell its just about the aesthetics, but if anyone knows otherwise, please let me know.
If I find an answer to that, I can order the holograms today, have them by the weekend, and go from there.
Yes... I would agree, that for the most part the larger holograms are to show off a nice design or the maker's name/logo on their hologram.
Also to add, would be the addition of windows on some makers holograms to have the 1st bits display, possibly warranting a need of a larger hologram.