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Maple ESP32 Mini - small development board with ESP32 PICO D4

One more development board with ESP32 PICO D4. This development board called Maple ESP32 Mini, is very small and the seller wrote that this board is the smallest dev board with ESP32 PICO D4 on the world.

Maple ESP32 Mini doesn't include much, maybe that's the feature which you looking for.
The board is really small (51 mm x 18 mm), you can connect external antenna and important component is USB-UART converter CP2104 which is used for programming of ESP32.

The board contains two buttons (reset and user) and also USB connector.

Now, there are pre-orders and you can buy it for 9.90 USD + shipping (2.90 USD)

Github of seller: