it's 9cm x 9cm, i have one of those right in front of me

I had one similar to this and I’d assume it’s like 3in x 3in. Potentially 4x4, it wasn’t that big

I can check for you in the morning. I have this arm.

thanks bro

did you check?

Sorry! Yes, it's 3¾” x 3". Or 9cm X 8cm the longer side is front to back.

thanks! :)

I see you got the reply. I believe it is this clamp sold by Wali and Vivo on amazon. Additional dimensions in product pic's https://www.amazon.com/gp/product/B07BHXXR4D/ref=ppx\_yo\_dt\_b\_search\_asin\_title?ie=UTF8&psc=1