Hello, first of all, the chair must stand firmly and not wobble. The length of the seat should be optimal so that there is no discomfort, as if you do not have enough seat. Chairs that are in the kitchen should have the following characteristics, such as:
You should be comfortable with your back and lower back;
The chair should stand well and clearly on the floor and not sway, while the legs of the chair should in no case move apart;
The seat of the chair should be of a normal size so that you can sit comfortably on it.
Personally, I have custom metal chairs, which are specially made according to my requirements and fit perfectly with the interior of the kitchen.