Char Siew bao are shrinking. Traditionally, char siew bao is always slightly smaller than the bak bao. The first mini size char siew bao I think was started by Tanjong Rhu bao. But it was still of a decent size. Then there was D’bun. Theirs was pretty small and then I discovered the bao at Toa Payoh.
This must be the absolutely the miniest of all char siew bao. They are so small that I can pop 2 into my mouth easy enough and swallow them without choking. At this rate, each bao will shrink to the size of a M&M!