4 layers52.5 × 22.9 mm

Feather STM32WB55
makeristic/Feather_STM32WB55
KiCad STM32WB55 Bluetooth development board in the Adafruit Feather form factor, with USB-C and STEMMA QT. Work in progress.
50 parts2MIT
KiCad boards from 4 GitHub repositories tagged “adafruit-feather”, the most starred first; open any of them in PCBKit.

makeristic/Feather_STM32WB55
KiCad STM32WB55 Bluetooth development board in the Adafruit Feather form factor, with USB-C and STEMMA QT. Work in progress.

makeristic/Adafruit_Feather
KiCad 5 template for Adafruit Feather-compatible boards with Micro-USB, JST PH battery connector, headers, and mounting holes.

makeristic/Adafruit_Feather_USB-C
KiCad 5 template for USB-C Adafruit Feather-compatible boards with JST PH battery connector, headers, and mounting holes.

mikeysklar/feather-sdio
A simple SDIO breakout FeatherWing adapter board (KiCad)