A "medium" bag from two brands can differ by a litre. The only honest way to compare is the three interior numbers. Here is how to read them.
Width × Height × Depth
Width is the opening, height is top to bottom, depth is front-to-back (how fat it is). The goyard-style tote lists a real interior width that clears a 15-inch laptop — check that number, not the photo.
Usable vs Stated
Thick walls eat space. A bag stated 30 cm wide may be 27 cm usable. The totes here are slim-walled, so stated ≈ usable.
Match to Your Load
Pro tip: measure the widest thing you carry (laptop, water bottle, makeup pouch) and add 2 cm. That interior width is your minimum — everything else is marketing.
Use the handbag specs to size before you buy, not after.
Frequently Asked Questions
How do I measure a handbag?
Measure the interior: width (opening), height (top to bottom), depth (front to back). Those three numbers tell you the real capacity — far more than a "small/medium/large" label.
What is bag depth?
Depth is how fat the bag is front-to-back. A bag with more depth holds more than a flat one of the same width and height.
Why do bag sizes differ between brands?
Brands measure differently and thick walls eat space, so "medium" varies. Always compare the interior width to the widest item you carry, plus 2 cm.