How is a laptop sleeve supposed to fit?
Well, just enough so it feels protected. if you have a 13 inch laptop, you don’t want to buy a 17 inch laptop sleeve. Basically, a sleeve’s purpose is to somewhat protect your laptop from bumps and scratches if you are using a regular backpack so your books and other things don’t harm your expensive piece of machinery. I doubt it will protect against drops though so I would still be careful.