Hi ~
I checked Pi4 datasheet mechanical drawing, there is no size about the bcm2711. We do not have the pi4 yet. But the Pi3B+ BCM2837 size is 14*14mm. BCM2711 and BCM2837 looks similar size.
The biggest heat sink size is 14 x 14 mm for both products.
So we think the heat sink works with pi4.
<LINK_TEXT text=“https://www.seeedstudio.com/category/Ra … -3078.html”>https://www.seeedstudio.com/category/Raspberry-pi-c-1010/Copper-HeatSink-Cooling-Kit-for-Raspberry-Pi-p-3078.html</LINK_TEXT>
<LINK_TEXT text=“https://www.seeedstudio.com/category/Ra … -1654.html”>https://www.seeedstudio.com/category/Raspberry-pi-c-1010/Aluminum-Heatsink-Kit-for-Raspberry-Pi-p-1654.html</LINK_TEXT>
Thanks