Best toddler backpacks and rucksacks: what to compare

Size by age, not by label

Under three, keep it tiny. Around 2 litres is enough for a snack, a beaker and a spare set of clothes, and it stays narrow enough not to unbalance a child who is still learning to run.

From about three, when nursery folders and lunch boxes appear, 10 litres becomes useful and still fits a small back at 32 cm high and 25 cm wide. Anything wider than their shoulders is too wide, whatever the litre figure says.

• Ages 1 to 3: roughly 2 litres, light, ideally with a rein option.
• Ages 3 to 5: roughly 10 litres, tall enough for A4, with a chest strap.
• Ages 5 and up: 10 to 14 litres, once reading folders and PE kit arrive.
• Weight matters: a toddler should carry no more than about a tenth of their own body weight.

A closure a toddler can work alone

Zips catch, jam and need two hands going in opposite directions. A roll top folds down two or three times and presses shut, which is why a three-year-old can close one without help.

Watch a child open a bag in a shop if you can. The one they can manage is the one that actually gets worn, rather than carried by a parent from the car to the door.

• Roll top: fold, press, done, and it shrinks as the bag empties.
• Zip: fastest for adults, most frustrating for small hands.
• Drawcord: easy to open, easy to leave open, and rain gets straight in.

Straps, reins and staying on

A chest strap matters more at this age than any pocket. It stops the straps sliding off shoulders that have not broadened yet, which is the single most common reason a toddler takes a bag off after ten minutes.

Reins are a separate decision. A detachable rein is genuinely useful on a pavement with a runner, and it is a real point in the LittleLife toddler pack's favour. plop does not offer one.

• Padded adjustable straps, so the same bag still fits next year.
• A chest strap the child can clip themselves.
• A rein if you have a bolter, and a bag that lets you remove it later.

Assume it will be filthy

Toddler bags meet mud, paint, yoghurt and puddles in their first week. A soft matte TPU fabric keeps all of it on the surface, so a damp cloth is enough. Woven and textured fabrics hold dirt in the weave and never quite recover.

No waterproof bag should go in the washing machine. Warm water, a drop of washing-up liquid, then air dry away from radiators, and it still looks new in year three.

What actually fails on a toddler's bag

It is almost never the fabric. It is the base, which is dragged along pavements, and the point where the strap joins the body, which takes the whole weight when a bag is swung by one strap. Zips come third, usually jamming on something a child pushed in sideways.

That is the case for welded seams, a reinforced base and a closure with no mechanism, rather than for a particular brand.

How we compared these bags

Every figure comes from the maker's own product page rather than a retailer listing or a review site, and where a maker publishes no figure the table says so. Photos are each brand's own image, linked back to the page the specifications came from.

Checked on 15 September 2026. Prices move with sales, so check before buying. We make one of these bags, so read the numbers rather than the adjectives.

Common questions

What size backpack does a 3 year old need?

Around 10 litres, roughly 32 cm high by 25 cm wide, is a good fit from age three. It takes a lunch box, spare clothes, a bottle and a nursery folder without being wider than the child.

What size backpack does a 2 year old need?

About 2 litres, around 23 cm high. That holds a snack, a beaker and a change of clothes, which is all a two-year-old should be carrying.

Should a toddler backpack be waterproof?

It helps more than it does for an older child, because toddler bags spend their time on wet grass and cloakroom floors. A waterproof fabric with sealed seams also means a spilled drink stays inside the bag.

How much weight can a toddler carry in a backpack?

As a rule of thumb, no more than about a tenth of their body weight, which is why a 2 litre bag is right under three and why an oversized bag gets abandoned.

Backpack or rucksack for a toddler?

They are the same thing. What matters is the capacity, the closure the child can manage, and whether it wipes clean.

Do toddler backpacks with reins work?

Yes, for a child who runs, and the useful ones let you detach the rein later so the bag outlives that phase. The LittleLife Butterfly Toddler includes one; plop does not.