Strap length decides how a bag sits. Shoulder straps keep a bag close to your side for walking and transit, while crossbody straps leave your hands free. Check the drop before you buy so the bag lands where you need it.
Compartment layout matters as much as size. Look for a padded sleeve if you carry a laptop, a zip pocket for keys and cards, and an inner divider that keeps small items from sinking to the bottom. Materials affect daily wear, so read each product description for the fabric and finish before you order.