Decide on the bag's purpose - What are the things that you're going to carry in it? Books, clothes, food, laptop or a handful of documents? Your bag's purpose will determine the perfect size, material (leather, nylon or canvass) and design (detailing and internal compartments) for you to choose.
Find a comfortable strap - A comfortable strap is the kind of strap that doesn't rub against the skin and doesn't cut easily. If you will be using your bag daily going to school or work, choose a variant with a wide and adjustable strap.
Check the pockets and compartments - The bag should have enough sections to hold the things that you'll need to bring with you daily. These include stationery, a mobile phone and a purse. Some messenger bags may have a panel with dedicated slots for pens, and small items. While too many pockets seem practical, you must be aware that it can encourage you to overpacking. So, it is best to choose a bag with standard number of compartments and pockets.
Pick an appropriate style - Are you going to wear your messenger bag to work with your suit? If yes, you'll need one that is made of leather. Canvass or nylon bags are ideal to use in less formal occasions.
Set a budget - Before making any purchase, know how much money you can spend on a bag. While high priced designer bags may offer good quality, moderately priced messenger bags can be a more practical option specifically if you don't have a big budget.
