How to Set menu size on gvim

I am using gvim version 8.2 on ubuntu 22.04,
Huge version with GTK3 GUI.

How may I set the menu size to a larger font?

I have found instructions for versions with Athena or Motif but none that are current
for modifying menu sizes on versions with GTK3.

Thanks

--   Tim  thjmmj15@gmail.com