Adafruit Raspberry Pi HATs and Bonnets (PiTFT, Motor HAT, RGB Matrix, BrainCraft, Speaker, Joy, CRICKIT…) — dimension sheet Source: Xem Studio, https://xemstudio.com/objects/adafruit-pi-hats-bonnets/ (CC BY 4.0) Basis: Adafruit CAD (MIT); HAT spec 65 × 56.5 mm with the Pi's four Ø2.75 holes on 58 × 49 mm; Bonnets 65 × 30 mm (Pi Zero outline) Catalog version: 2026-10-20 Sizes: see table below - HAT: 65 × 56.5 mm board, four Ø2.75 mm holes on 58 × 49 mm matching the Pi, 2×20 socket 2.54 mm; stacks at 11 mm above the Pi board (16 mm with the 11 mm standoff). Rounded corners R3. - Bonnet: 65 × 30 mm (Pi Zero outline), two holes 58 mm apart (some four on 58 × 23 mm). Bonnets fit any Pi. - PiTFT 2.8 covers the HAT outline with the display centred; PiTFT 3.5 overhangs to 85 × 56 mm. RGB Matrix Bonnet and BrainCraft add 10–20 mm of height for connectors and the display. product bbox_l_mm bbox_w_mm bbox_h_mm 2423 PiTFT 2.8 85.0 56.0 24.3 2441 PiTFT 3.5 97.4 56.5 18.8 2348 Adafruit Motor HAT 65.0 56.5 7.2 3211 RGB Matrix Bonnet 66.2 30.7 18.1 4374 BrainCraft HAT 65.0 58.5 24.4 3346 Adafruit Speaker Bonnet for Pi 65.0 31.0 13.8 3464 Joy Bonnet 65.0 30.7 13.8 3422 Adafruit Arcade Bonnet 65.0 30.0 16.1 3386 PiRTC PCF8523 21.2 20.0 10.3 6365 Pi STEMMA QT Breakout 15.3 14.7 7.1 6418 E-Ink Bonnet 65.0 30.9 13.8 4863 CYBERDECK Hat 77.6 65.2 18.8 4132 GPIO Expander Bonnet 65.0 30.7 14.3 4074 LoRa Radio Bonnet 65.0 30.7 9.4 4280 DC Stepper Motor Bonnet 65.0 30.7 13.8 4506 TFT Bonnet 65.0 30.7 16.9 6358 Triple LED Matrix Bonnet 65.0 30.7 16.0 4862 CYBERDECK Bonnet 65.2 51.7 18.8 2315 PiTFT 2.2 65.0 57.0 10.4 3577 PICO Hat 65.0 19.0 1.6 Files elsewhere (not hosted by Xem Studio; license as stated by the publisher): - Adafruit (official): Adafruit_CAD_Parts: STEP, Fusion 360 and STL for Adafruit products — STEP, F3D, STL — MIT — https://github.com/adafruit/Adafruit_CAD_Parts Free files (MIT License (Adafruit_CAD_Parts), Adafruit Industries; STEP + STL, 20 parts): https://xemstudio.com/files/adafruit/adafruit-pi-hats-bonnets/index.json API: https://xemstudio.com/api/geometry?object=adafruit-pi-hats-bonnets