Atron Vision 27" WQHD Gaming Monitors

I just got one. Beautiful display and really optimized for gaming. Since I play some older games occasionally I was pleased to see them displayed as in a 4:3 ratio instead of stretched to 16:9.
Only problem I have is that I’m using the vesa mount but don’t know how to remove the pedestal for the stand without taking it apart.

Is this 27" wide or measured diagonally like most monitors?

Considering the specs show the width to be 25" I’m going with 27" diagonally, like most monitors…