components - Small Piezo Buzzers

I am looking to get my hands on some Pizeo Buzzers that are as small as possible. So far I have found 10mm round, which is good, but I was wondering if anyone knew of ones that are smaller still?

I would prefer to avoid SMD components if at all possible, but I can deal with it if need be. At the end of the day, as small as 5x5mm would be great.

Answer

I found a Pizeo Buzzer with 6.5 mm here:

1. PDF with specifications


2. The item in a shop