What ceramic media is best to use in a vibrating tumbler?

Many people like to use a mixture of both the large non-abrasive and small non-abrasive ceramic media. The large does tend to breakdown over time into a size similar to the small so you may only need to order the small once, and then cycle out the old and new large after that. But if you wanted to go a straight size you absolutely could, just make sure you only use the non-abrasive.