# Adafruit Raspberry Pi HATs and Bonnets (PiTFT, Motor HAT, RGB Matrix, BrainCraft, Speaker, Joy, CRICKIT…)

> What are Raspberry Pi HAT and Bonnet dimensions?

- Category: Electronics › Modules & cameras
- Kind: Modern device
- 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)
- Page: https://xemstudio.com/objects/adafruit-pi-hats-bonnets/ · JSON: https://xemstudio.com/api/geometry?object=adafruit-pi-hats-bonnets · Plain text: https://xemstudio.com/objects/adafruit-pi-hats-bonnets/sheet.txt
- License: dimension sheet CC BY 4.0 (Xem Studio); linked files under their publishers' licenses

## Notes

- 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.

## Sizes

| 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 |

## Where the files are

- Adafruit (official): [Adafruit_CAD_Parts: STEP, Fusion 360 and STL for Adafruit products](https://github.com/adafruit/Adafruit_CAD_Parts) — STEP, F3D, STL — MIT

## Free STEP/STL (20 parts, MIT License (Adafruit_CAD_Parts), Adafruit Industries)

Index: https://xemstudio.com/files/adafruit/adafruit-pi-hats-bonnets/index.json

- 2423-pitft-2.8: [STEP](https://raw.githubusercontent.com/adafruit/Adafruit_CAD_Parts/main/2423%20PiTFT%202.8/2423%20PiTFT%202.8.step) — Adafruit #2423 PiTFT 2.8; bbox 85.0 × 56.0 × 24.3 mm; 0.2 MB on GitHub
- 2441-pitft-3.5: [STEP](https://raw.githubusercontent.com/adafruit/Adafruit_CAD_Parts/main/2441%20PiTFT%203.5/2441%20PiTFT%203.5.step) — Adafruit #2441 PiTFT 3.5; bbox 97.4 × 56.5 × 18.8 mm; 0.1 MB on GitHub
- 2348-adafruit-motor-hat: [STEP](https://raw.githubusercontent.com/adafruit/Adafruit_CAD_Parts/main/2348%20Adafruit%20Motor%20HAT/2348%20Adafruit%20Motor%20HAT.step) · [STL](https://raw.githubusercontent.com/adafruit/Adafruit_CAD_Parts/main/2348%20Adafruit%20Motor%20HAT/2348%20Adafruit%20Motor%20HAT.stl) — Adafruit #2348 Adafruit Motor HAT; bbox 65.0 × 56.5 × 7.2 mm; 2.1 MB on GitHub
- 3211-rgb-matrix-bonnet: [STEP](https://raw.githubusercontent.com/adafruit/Adafruit_CAD_Parts/main/3211%20RGB%20Matrix%20Bonnet/3211%20RGB%20Matrix%20Bonnet.step) · [STL](https://raw.githubusercontent.com/adafruit/Adafruit_CAD_Parts/main/3211%20RGB%20Matrix%20Bonnet/3211%20RGB%20Matrix%20Bonnet.stl) — Adafruit #3211 RGB Matrix Bonnet; bbox 66.2 × 30.7 × 18.1 mm; 3.1 MB on GitHub
- 4374-braincraft-hat: [STEP](https://raw.githubusercontent.com/adafruit/Adafruit_CAD_Parts/main/4374%20BrainCraft%20HAT/4374%20BrainCraft%20HAT.step) · [STL](https://raw.githubusercontent.com/adafruit/Adafruit_CAD_Parts/main/4374%20BrainCraft%20HAT/4374%20BrainCraft%20HAT.stl) — Adafruit #4374 BrainCraft HAT; bbox 65.0 × 58.5 × 24.4 mm; 5.8 MB on GitHub
- 3346-adafruit-speaker-bonnet-for-pi: [STEP](https://raw.githubusercontent.com/adafruit/Adafruit_CAD_Parts/main/3346%20Adafruit%20Speaker%20Bonnet%20for%20Pi/3346%20Adafruit%20Speaker%20Bonnet%20for%20Pi%20Rev%20D.step) — Adafruit #3346 Adafruit Speaker Bonnet for Pi; bbox 65.0 × 31.0 × 13.8 mm; 2.3 MB on GitHub
- 3464-joy-bonnet: [STEP](https://raw.githubusercontent.com/adafruit/Adafruit_CAD_Parts/main/3464%20Joy%20Bonnet/3464%20Joy%20Bonnet.f3d.step) — Adafruit #3464 Joy Bonnet; bbox 65.0 × 30.7 × 13.8 mm; 0.1 MB on GitHub
- 3422-adafruit-arcade-bonnet: [STEP](https://raw.githubusercontent.com/adafruit/Adafruit_CAD_Parts/main/3422%20Adafruit%20Arcade%20Bonnet/3422%20Adafruit%20Arcade%20Bonnet.step) — Adafruit #3422 Adafruit Arcade Bonnet; bbox 65.0 × 30.0 × 16.1 mm; 0.1 MB on GitHub
- 3386-pirtc-pcf8523: [STEP](https://raw.githubusercontent.com/adafruit/Adafruit_CAD_Parts/main/3386%20PiRTC%20PCF8523/3386%20PiRTC%20PCF8523.step) · [STL](https://raw.githubusercontent.com/adafruit/Adafruit_CAD_Parts/main/3386%20PiRTC%20PCF8523/3386%20PiRTC%20PCF8523.stl) — Adafruit #3386 PiRTC PCF8523; bbox 21.2 × 20.0 × 10.3 mm; 0.7 MB on GitHub
- 6365-pi-stemma-qt-breakout: [STEP](https://raw.githubusercontent.com/adafruit/Adafruit_CAD_Parts/main/6365%20Pi%20STEMMA%20QT%20Breakout/6365%20Pi%20STEMMA%20QT%20Breakout.step) — Adafruit #6365 Pi STEMMA QT Breakout; bbox 15.3 × 14.7 × 7.1 mm; 0.7 MB on GitHub
- 6418-e-ink-bonnet: [STEP](https://raw.githubusercontent.com/adafruit/Adafruit_CAD_Parts/main/6418%20E-Ink%20Bonnet/6418%20E-Ink%20Bonnet.step) — Adafruit #6418 E-Ink Bonnet; bbox 65.0 × 30.9 × 13.8 mm; 4.9 MB on GitHub
- 4863-cyberdeck-hat: [STEP](https://raw.githubusercontent.com/adafruit/Adafruit_CAD_Parts/main/4863%20CYBERDECK%20Hat/4863%20CyberDeck%20HAT.step) · [STL](https://raw.githubusercontent.com/adafruit/Adafruit_CAD_Parts/main/4863%20CYBERDECK%20Hat/4863%20CyberDeck%20HAT.stl) — Adafruit #4863 CYBERDECK Hat; bbox 77.6 × 65.2 × 18.8 mm; 3.2 MB on GitHub
- 4132-gpio-expander-bonnet: [STEP](https://raw.githubusercontent.com/adafruit/Adafruit_CAD_Parts/main/4132%20GPIO%20Expander%20Bonnet/4132%20GPIO%20Expander%20Bonnet.step) — Adafruit #4132 GPIO Expander Bonnet; bbox 65.0 × 30.7 × 14.3 mm; 2.7 MB on GitHub
- 4074-lora-radio-bonnet: [STEP](https://raw.githubusercontent.com/adafruit/Adafruit_CAD_Parts/main/4074%20LoRa%20Radio%20Bonnet/4074%20LoRa%20Radio%20Bonnet.step) · [STL](https://raw.githubusercontent.com/adafruit/Adafruit_CAD_Parts/main/4074%20LoRa%20Radio%20Bonnet/4074%20LoRa%20Radio%20Bonnet.stl) — Adafruit #4074 LoRa Radio Bonnet; bbox 65.0 × 30.7 × 9.4 mm; 2.1 MB on GitHub
- 4280-dc-stepper-motor-bonnet: [STEP](https://raw.githubusercontent.com/adafruit/Adafruit_CAD_Parts/main/4280%20DC%20Stepper%20Motor%20Bonnet/4280%20DC%20Stepper%20Motor%20Bonnet.step) — Adafruit #4280 DC Stepper Motor Bonnet; bbox 65.0 × 30.7 × 13.8 mm; 4.1 MB on GitHub
- 4506-tft-bonnet: [STEP](https://raw.githubusercontent.com/adafruit/Adafruit_CAD_Parts/main/4506%20TFT%20Bonnet/4506%20TFT%20Bonnet.step) · [STL](https://raw.githubusercontent.com/adafruit/Adafruit_CAD_Parts/main/4506%20TFT%20Bonnet/4506%20TFT%20Bonnet.stl) — Adafruit #4506 TFT Bonnet; bbox 65.0 × 30.7 × 16.9 mm; 2.1 MB on GitHub
- 6358-triple-led-matrix-bonnet: [STEP](https://raw.githubusercontent.com/adafruit/Adafruit_CAD_Parts/main/6358%20Triple%20LED%20Matrix%20Bonnet/6358%20Triple%20LED%20Matrix%20Bonnet.step) — Adafruit #6358 Triple LED Matrix Bonnet; bbox 65.0 × 30.7 × 16.0 mm; 2.5 MB on GitHub
- 4862-cyberdeck-bonnet: [STEP](https://raw.githubusercontent.com/adafruit/Adafruit_CAD_Parts/main/4862%20CYBERDECK%20Bonnet/4862%20CyberDeck%20Bonnet.step) · [STL](https://raw.githubusercontent.com/adafruit/Adafruit_CAD_Parts/main/4862%20CYBERDECK%20Bonnet/4862%20CyberDeck%20Bonnet.stl) — Adafruit #4862 CYBERDECK Bonnet; bbox 65.2 × 51.7 × 18.8 mm; 3.2 MB on GitHub
- 2315-pitft-2.2: [STEP](https://raw.githubusercontent.com/adafruit/Adafruit_CAD_Parts/main/2315%20PiTFT%202.2/2315%20PiTFT%202.2.step) — Adafruit #2315 PiTFT 2.2; bbox 65.0 × 57.0 × 10.4 mm; 0.1 MB on GitHub
- 3577-pico-hat: [STEP](https://raw.githubusercontent.com/adafruit/Adafruit_CAD_Parts/main/3577%20PICO%20Hat/3577%20PICO%20Hat.step) — Adafruit #3577 PICO Hat; bbox 65.0 × 19.0 × 1.6 mm; 0.0 MB on GitHub

## Questions

**What are Raspberry Pi HAT dimensions?**

65 × 56.5 mm with four Ø2.75 mm holes on 58 × 49 mm, the same as the Pi's; 11 mm standoffs between the Pi and the HAT.

**What is the difference between a HAT and a Bonnet?**

Size: a HAT is 65 × 56.5 mm (full Pi width), a Bonnet is 65 × 30 mm (Pi Zero width); both use the 40-pin header and fit any Pi.

**How much height does a HAT add?**

About 11 mm board-to-board plus the component height; plan 25 mm above the Pi board for most HATs, 30 mm for the PiTFT with its display.

## Fits with

- [Raspberry Pi 5](https://xemstudio.com/objects/raspberry-pi-5/)
- [Raspberry Pi 4 Model B](https://xemstudio.com/objects/raspberry-pi-4-b/)
- [Raspberry Pi Zero 2 W](https://xemstudio.com/objects/raspberry-pi-zero-2-w/)
- [Threaded standoffs, M2.5 and M3 (hex and round)](https://xemstudio.com/objects/threaded-standoffs-metric/)
- [2.54 mm pin headers, 1×2 to 2×20, vertical and right-angle](https://xemstudio.com/objects/pin-headers-2.54mm/)