It's just not mathematically possible to draw a proper "$" 4 pixels wide, since you need at least 2 pixels one each side of the vertical line to draw the enclosed areas.
Some of these can look like $ if they're really tiny, but generally you'll need a while to figure out what's they're supposed to mean if you don't know what you're looking for.
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#> Here's some options that fit in 4 pixels
So which is it?