Twenty litres seems quite little – that is, until you really start filling one. It’ll hold your laptop, some lunch, a spare outfit, and even a water bottle – leaving just a bit of space free. So that makes it the very typical size for those who shuttle back-and-forth between their desk, the gym, and an airplane all within a week’s time frame itself. If it’s too small you end up hiding a jacket under your arm instead. But if it’s too big, then you’re lugging around unnecessary weight. OGIO’s 20 litre backpack range sits right in that sweet spot, built for laptops, gear, and daily grind without turning into a bulky travel pack. Right size really depends on your daily life – rather than just picking out the largest item on the shelf.

Table of Contents

Why 20 Litres Is the Everyday Sweet Spot

Most airlines set a maximum size for personal items – about 40 x 30 x 15 cm, really – and a very well-shaped 20-litre backpack fits that space almost perfectly. Small daypacks under 15 litres often struggle to carry a laptop plus a spare outfit. Packs larger than 30 litres will start feeling too big for a carry-on – and quite bulky on public transport or in a crowded office. Twenty litres will hold a 15- to 16-inch laptop, a tablet, a coat, and a day’s worth of snacks – all without the bag appearing overly full.

Check the Laptop Sleeve Before Anything Else

Measure your laptop first, screen size plus the charger brick, not just the laptop alone.
A padded sleeve that sits against your back protects the screen if the bag gets dropped.
Sleeves with a top zip entry are faster at airport security than back-panel designs.
Firm foam padding beats soft fabric padding for actual drop protection.
A separate tablet pocket stops cables and chargers from scratching the laptop screen.

Straps and Back Panels Matter More Than Capacity

A 20-liter pack loaded with a laptop charger and all your daily essentials normally weighs between 3 and 5 kilograms. This can be quite uncomfortable digging into your shoulders after an 8-hour workday – especially when the straps are very thin or poorly padded. Wider, more contoured shoulder straps do a much better job of distributing that weight. An adequately ventilated back panel – often made of mesh or raised foam – helps keep your back cool even when commuting on a hot day (so you won’t be sweating through your shirt). And although it may seem small, a sternum strap really helps stabilize the entire pack – perfect if you’re running for a train or cycling to work.

Feature	Why It Matters	Skip If
Padded laptop sleeve	Protects the screen from drops and bumps	You never carry a laptop
Ventilated back panel	Stops sweat build-up on warm days	You only use it indoors
Water bottle side pocket	Keeps drinks separate from electronics	You never carry liquids
Compression straps	Shrinks the bag when it’s half empty	You always pack it full