OnedorSynthetic Fiber Hair Extension Chignon Donut Bun Wig Hairpiece (1B - Off Black)

Is the width of the bun once on really 4in or less? I'm in the military and 4in is the maximum width I'm allowed in uniform.

How would you describe the color 2/33?

How does this stay on your head?

Are the colors more accurate or the names? Looking for a light auburn/dark strawberry blonde, #12 light brown “looks” like right color but not name