Hacker News Reader

Six of them fit on the face of a dime, which is wild.

Unlike the FDK module, this module requires an external crystal oscillator, which makes me think that the total footprint ends up being larger.

To be fair to Silicon Labs, they don't claim the smallest BLE module but FDK did exactly that [1].

[1] The world's smallest Bluetooth® Low Energy Module, the new model "HY0021":