Not Sure how big your' laptop is? Here's a quick guide.

A laptop's size is determined by it's cross lengths. Measure from the top corner of your' laptop to the bottom corner on the opposite side in inches. This will give you the size of your' laptop. Generally laptops are either 17" or 15.4", but can come larger and smaller.

If You're buying a laptop case for someone else and don't know their dimensions you generally can't lose if you buy a case that fits a 17" laptop.