$6 WT32-ETH01 is a Tiny ESP32 board with Ethernet - CNX Software
ESP32 D1 Mini Bluetooth+WiFi Board — Maker Portal
ESP32-C3: A Game-Changing Microcontroller for IoT & Wearable Applications - High Voltages
The smallest esp32 module (so far…) – lucadentella.it
World's Smallest ESP32 V2 | Luís Carlos
TinyPICO
Seeed Studio Xiao Esp32-c3 Ble Wifi Wireless Development Board Module Seeeduino Esp32c3 Tiny Mcu 4mb 400kb Psram For Arduino - Integrated Circuits - AliExpress
Amazon.com: Dorhea ESP32 Mini NodeMCU Board, MH-ET Live MiniKit for ESP32 WiFi Module Bluetooth Internet of Development Board Based ESP8266 Fully Functional with Pins for WeMos D1 DIY Kit 6PCS : Electronics
TinyPICO - A tiny, mighty ESP32 development board - Electronics-Lab.com
TinyPICO
TinyS2 - ESP32-S2 — Unexpected Maker
The smallest esp32 module (so far…) – lucadentella.it
TinyS2 - ESP32-S2 Development Board : ID 5029 : $18.50 : Adafruit Industries, Unique & fun DIY electronics and kits