I don't see how this, even remotely, qualifies as worldbuilding. Anyways. Your question seems to be a question about leather. I'm not an expert, but I've never seen thin leather behave close to what human skin does. I guess you'd have to remove all of your hair and then glue it on. What would happen to all of your sweat, IDK. Of course, your nails, ears, and orifices would be a real problem. Take eye-lids, for example. Yeah, tough to replicate them. (Ears are a bit easier, you'd just cut yours off, and replace with plastic ones, or less extremely, just use make-up around the mask's ear holes to hide the edge between the leather and your ear.) Lips? Forget it. Could you fool the police? At a distance of 300 yards for 0.5 seconds? Sure. Across the table in an interrogation room? Not so much. I wrote about leather, above, but you probably know that silicone is much much much more commonly used in movies. There is a reason for this. The same issues would surround it. The real problem would be your face. (And your male genitals, as applicable.) Since your skin is constantly shedding, the glue you used would have a very limited lifetime before it began to fail, and your "skin" no longer moved the way real skin would. --You got more specific. Good, I guess. So, how are you going to find a person which is an exact match for you except just a half size bigger? Ridiculous. Making it out of pieces? More ridiculous, absurd or delusional more like. I should also mention, that your sweat will build up under the leather and in like half a day, you'd be a smell-a-thon (I don't know if antimicrobials would work, I can't envision how you'd dose yourself effectively with them.) But lets say you're ok looking like a burn victim who has been thrown through several windows (and has the scars to prove it), who has long hair, a beard, and wears dark glasses. As long as you smell as bad as you probably will, I don't think many people would pay enough attention to you to notice your fake skin.