dired customization

[Klaus Jantzen]

Hi,

in dired I can use 'New Frame' (C-x 5 2) to display a previously 
selected file in a new, bigger frame.

Looking through the customization options for dired I did not find a 
solution for the following question:

Which option do I have to change to alter the dimensions of this new frame?

I am using Emacs 26.1 under Debian Buster.

--

K.D.J.