[LeifCarrotson]

The Lilygo TTGO Micro32 module with the ESP32-PICO-D4 chip:

https://www.amazon.com/dp/B07RLLY5WZ

https://www.aliexpress.com/item/32869180373.html

is smaller - just 19x13mm! Though it doesn't include USB connector, power supply, USB-serial IC, etc.

It's used in the Open Smartwatch project (https://open-smartwatch.github.io/).

[seonr]

This is a better comparison - full dev board, just add your own USB connector of choice . https://www.tinypico.com/tinypico-nano

[seonr]

That's a module - it cant be used for anything unless you mount it to a bigger carrier PCB and add all of the extra components.