# 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()# Set min window size
root = Tk()
root.minsize(500, 500)import tkinter
window = tkinter.Tk() # creating the window object
window.title('my first GUI program')
window.minsize(width=600, height=500) # makes the window 500*600
window.mainloop() # keeping the window until we close itwindow = Tk()
#set window size
window.geometry("widthxheight") window = Tk() # or window = TopLevel()
# "350x150" == window size (350 pixels wide and 150 pixels high)
# "+220+80" == window position (220 pixels from the left screen margin and
# 80 pixels from the top screen margin
window.geometry("350x150+220+80")