Audimuteisolé - Sound Barrier and Absorption Sheet - Sound Blocker - Soundproofing Sheet (Steel)

If I hung this on the inside of a door in a bedroom would it block the noise that is in that very bedroom from coming out into the rest of the house?

What’s the effectiveness when there is a 5 inch space? As in 2.5 inches on either side of a window. Does it still block most of the sound?

What is the size of the box in which the shipment comes and the size of the folded product? Thanx!

How white is the white version - e.g. off-white or snow-white?