[Tkinter] Text Button - How Do I Reduce The Margin?

[vman44]

The width option doesn't work.

Here's my code:
b = Button(tkt, height=1, width=1, text='J', command=tkt.destroy, bg='#DEDEFF', fg="green")

Earlier in my script, I put:
# define font
myFont = font.Font(family='Helvetica', size=20, weight='bold')


The problem is that when I change the font size in myFont,
it keeps adjusting all the margins in the Button function.

I'll try the "grid" option later today.

Thanks, everyone, for the tips.

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Actually, the width margins are ok.
It's the height margins which are an issue.

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Using the grid didn't work.