tkinter canvas size code example
Example 1: rectangle in tkinter
from tkinter import *
root = Tk()
c = Canvas(root)
c.pack()
c.create_rectangle(100, 100, 200, 200)
root.mainloop()
Example 2: canvas.create_oval parameters
id = C.create_oval ( x0, y0, x1, y1, option, ... )