import tkinter as tk

root = tk.Tk()


class MLabel(tk.Canvas):
    def __init__(self, parent, text='Text', fill='black', font=('Calibri', 16), ratio=2/7, bg='#F2F2F2', *args, **kwargs):
        super().__init__(parent, *args, bg=bg, **kwargs)

        pady=int(font[1]*ratio)
        self.txtid = self.create_text(0, -pady, text=text, fill=fill, font=font, anchor='nw')
        bbox = self.bbox(self.txtid)
        self.configure(width=bbox[2], height=bbox[3]-pady)


label = MLabel(root, font=('Calibri', 50))
label.grid()

root.mainloop()