Before we look at actual models, we need to first understand what kind of 13-inch laptop bag we want. Essentially, the 13-inch laptop bag should be able to fit your Apple MacBook or MacBook Air very comfortably, and also allow you to store documents and small accessories like an iPod, digital camera, etc. Let's look at some models now.

Don't worry about its weird sounding name. The LAbesace is a great 13-inch laptop bag which will fit your 13-inch laptop very snugly. In addition, it allows you to store a great amount of accessories, and comes in a nice Classic or Lime Drop color.
 

The Be.ez LAbesace laptop bag
 

One thing it lacks is an outer pocket for full-size documents - something which we usually need in a bag. If you need to carry a water-bottle around, the LAbesace also lacks a water-bottle pouch.

This HardCase 13-inch bag from WaterField Designs is one of the most protective laptop bag's in the market. Made of leather, it incorporates a paragliding buckle (yes, the same kind you see in parachutes). You will find that the HardCase is an exceptionally well-made bag - but you need to pay a slight premium over other models.
 

The WaterField Designs HardCase 13" laptop bag

The STM Small Rouge is the third 13-inch laptop bag in our lineup. It is essentially a laptop backback, coming in a denim-and-navy design. There is a built-in rain cover, and ample, ample space for gear. Your iPod, iPhone, or sunglasses will sit extremely comfortable in this bag.
 

The STM Small Rogue laptop bag

Conclusion