These are the smallest ESP32-S3 development boards with an amazing 34 IO pins available and LiPo battery management built in.

Only 23.5mm x 18mm

A dual-core XTensa LX7 MCU 

capable of running at 240MHz

512 KB of internal SRAM, it also comes with 

integrated 2.4 GHz, 802.11 b/g/n Wi-Fi and 

Bluetooth 5 (LE)

Type-C USB connector

Shipping list:

1x ESP32-S3 SuperMini

2x male pins