# Change window_name to the name of the window object, i.e. root
window_name.geometry("500x500")
# To ensure widgets resize:
widget_name.pack(fill="both", expand=True)from tkinter import *
root = Tk()
root.maxsize(height, width)
root.minsize(height, width) #(69, 420)
root.mainloop()# Where w is a widget:
w.winfo_height()
w.winfo_width()# Set min window size
root = Tk()
root.minsize(500, 500)window = Tk()
#set window size
window.geometry("widthxheight")# import statement
from tkinter import *
# create GUI Tk() variable
gui = Tk()
# set window size
gui.geometry("widthxheight")