The 6-inch plastic twist tie is a good choice if you have run out of the twist ties that come free in our 8 & 10 pound plain top 8 & pound ice bags on wickets. Maybe you just would like to have extra twist ties on hand. Hey, it is always better to have a few extra and not need them than to need them and not have them.
Due to the amount of plastic bag that gathers when you want to close the smaller capacity ice bags, this is a proper choice. The 8-inch twist will, of course, work but it might be a bit on the overkill side, but don't let us stop you GO FOR IT!