The short answer: the best school backpack for kids in Australia is the right size for their stage, with padded straps and a bottle pocket. Our picks from the Spixal range: the 25L Junior backpack (400g empty) for daycare, preschool and the first years of school, the 28L Axis Kids Backpack for primary school, and The Daily, Flex, Momentum or Commute for high school.
Shop all Spixal school bags for primary and high school
Best School Backpacks for Kids in Australia at a Glance (2027)
| Best for | Spixal pick | Size | Why it wins |
|---|---|---|---|
| Daycare to the first years of school | Junior backpack | 25L, 400g empty | Three compartments, a D-ring for the hat clip, six bold prints |
| Best school bag for primary school | Axis Kids Backpack | 28L, 520g empty | Laptop sleeve, a bottle pocket that fits up to 1L, matching library bag and pencil case |
| High school, simple days | The Daily | 22L, 385g empty | Clean interior and a laptop sleeve |
| High school plus sport | The Flex | 26L, 460g empty | Two main compartments and a pocket for a locking phone pouch |
| The heaviest high school days | The Momentum | 36L, 490g empty | Our largest backpack, one extra-large compartment plus a laptop sleeve |
Written by Deanna Spicer, co-founder of Spixal. Our family has been sourcing and selling school bags and lunch gear for more than 35 years, and Spixal products have more than 14,000 customer reviews. Every Spixal product comes with a 12-month warranty and free returns within 30 days in Australia.
Walk past any school gate at pick-up and you'll see it. A kid so small the backpack looks like it's wearing them, straps down near their elbows, the whole thing swinging sideways with every step. Somewhere a parent bought the biggest bag they could find because it seemed like better value, and it's actually doing the opposite of its job.
A school backpack has one job. Carry what your kid needs, comfortably, for years, without becoming its own problem. Here's how to actually get that right, by age and stage.
This isn't a guess. My family's been buying, sourcing and selling backpacks for more than 35 years, and I've personally packed a school bag most mornings for the last 25 of them. Everything below is what actually held up, not what looked good on a spec sheet.
What Size Backpack for What Age
Size isn't about how much you can cram in. It's about what actually fits your child's back, because a bag that's too big rides too low and does more damage than a bag that's slightly too small.
- Daycare and preschool: small, light, just enough for a comfort item, a spare set of clothes and the lunch kit. This is where our junior character range lives, Monster Truck, Unicorn, Butterfly, Dinosaur, Astro Cat and Let's Play, all sized for little bodies, not scaled-down adult bags.
- Primary through lower high school: room for a lunch bag, drink bottle, library book, homework folder and a jumper, without swallowing a six-year-old. Our Axis range in eight colourways covers this whole stretch.
- High school: bigger, tougher, built for books, a laptop and a heavier daily load. This is where Daily, Flex, Momentum and Commute come in, four shapes for four different routines.
How to Measure Back Length
Forget the age label on the box. What actually matters is torso length, from the bony bit at the base of the neck to hip level. Sit your child down, measure that distance, and match it to the bag. A backpack whose base sits below the hips is too big, full stop, no matter what size it says on the tag.
How to Fit a School Backpack in 5 Steps
A good bag that's fitted badly still sits wrong. This takes two minutes, and it's worth doing at the start of every term because kids grow faster than straps get adjusted.
- Loosen everything first. Let both shoulder straps right out before your child puts the bag on.
- Both straps, every time. One-shoulder carrying pulls the whole load to one side.
- Tighten until it sits snug against the back. The bag should sit high and close, not hang off the shoulders, and the base shouldn't drop below the hips.
- Clip the chest strap across the chest so the straps can't slide out to the shoulder edges.
- Pack heavy things closest to the back. Books and the lunch bag against the back panel, light things in the front pocket.
Quick check: if your child is leaning forward to walk, or you can fit a hand between the bag and their back, it needs tightening or lightening.
What Makes a Backpack Actually Ergonomic
Padded straps get all the attention, but they're not the whole story. Look for:
- Wide, padded shoulder straps that don't dig in
- A padded back panel, not just fabric against a stack of books
- A chest strap on anything carrying real weight, it stops the bag pulling backward and throwing off balance
- Compartments that let you pack the heaviest thing closest to the back, not swinging out at the bottom
How Heavy Is Too Heavy
The rule of thumb physios use is 10 to 15 percent of your child's body weight, fully packed. For a 20kg preschooler that's 2 to 3kg, not the drink bottle, lunch box and three library books all in one side pocket. If your kid is leaning forward to walk or the straps are cutting red lines into their shoulders by 9am, the bag's either too heavy or too big for them right now, not something to just push through.
Who Actually Carries the Bag?
Here's the bit most backpack guides skip. In Australia, for daycare, kindy and the first years of school, it's usually Mum or Dad carrying the bag from the car to the classroom door, not the child. So the empty weight matters twice. Once for your child on the days they do wear it, and once for you, often with a younger sibling and your own bag in the other hand. That's one of the reasons our Junior range sits at 400g empty, and why a bag with a proper place for everything matters at drop-off when you're handing it over to the teacher or educator. If you're at the daycare stage, here's how to choose the right daycare backpack.
Chest Strap and Hip Belt, Necessary or Not
A chest strap earns its place from primary school onward, it keeps the bag sitting where it should instead of sliding off one shoulder every ten steps. A hip belt is more of a hiking-bag feature than a school one, nice on a heavy high school load, not essential for most kids.
How Long Should a School Backpack Actually Last
A well-built backpack should get a full school year at minimum, ideally two or three for the sturdier ranges. Watch the zips first, they're usually the first thing to go, then the strap stitching. If you're replacing a backpack every term, that's not bad luck, that's the bag. Across our own range, returns sit under 1 percent.
Every Spixal backpack is also covered by our 12-month Made To Last warranty for defects in materials and workmanship, and if it isn't right for your child you've got 30 days to return it free within Australia, in clean, good condition with its original packaging. The full details are in our returns and warranty policy.
What They're Actually Made Of
Most kids' backpacks are polyester, and there's nothing wrong with that. We just don't build every range from the same fabric, because a preschooler's bag and a Year 11's bag are actually solving different problems.
| Range | Material | Empty weight | Why |
|---|---|---|---|
| Axis | Cotton twill, with 600D polyester where the print sits (Leopard only) | 520g | Softens the look. Says "not a sports bag" without giving up durability. On Leopard, the print itself uses a soft, subtle tone rather than the usual bold leopard look, so the bag still reads soft even with polyester in the mix. |
| Junior character range | Polyester | 400g | Light enough for a small body to carry comfortably from daycare through preschool. |
| Daily | Polyester 600D | 385g | Kept light on purpose. High schoolers carry this bag all day. |
| Flex | Polyester 600D | 460g | Same lightweight logic as Daily, in a shape built for a changing daily load. |
| Momentum | Polyester ripstop | 490g | The toughest fabric in the range, built for the heaviest daily load, and still lighter than Commute empty despite being the biggest bag we make. |
| Commute | Nylon | 530g | A slight sheen and a shape that's nothing like a sports bag, closer to a work or uni bag an older teen would actually choose. |
We went with 600D on purpose, not 900D. We actually weighed a popular 900D backpack on the market at 670g, roughly 150 to 250g heavier than our range before a single book goes in. That matches what parents and kids kept telling us too, that the bag itself felt heavy before it was even packed. 900D is tougher on paper, but for a bag a kid carries all day, that extra weight was solving a problem nobody actually had.
What Actually Makes Each Range Different
Same materials logic, five very different jobs. Here's the size and the one feature that actually sets each one apart, not the marketing version.
| Range | Size / capacity | What makes it different |
|---|---|---|
| Junior character range | 47 x 31 x 14cm, 25L | 3 compartments and a D-ring for the hat clip, sized for daycare through preschool, not a scaled-down adult bag. |
| Axis | 32 x 50 x 19cm, 28L | A laptop sleeve and a bottle pocket that fits the Spixal 750ml bottle or a full 1L bottle, still with the D-ring for the hat clip. |
| Daily | 44 x 27 x 18cm, 22L | One main compartment, one front pocket, nothing to overthink. |
| Flex | 48 x 33 x 16cm, 26L | A dedicated pocket sized for a locking phone pouch, Yondr, PhoneLocker or Salus Pouch, whatever your school issues, plus a second compartment that keeps lunch separate from devices, a stationery organiser with a keychain clip, and a hidden front pocket for the things a teenager doesn't want on display. |
| Momentum | 48 x 33 x 24cm, 36L | The biggest in the range by a wide margin, one extra-large compartment plus a laptop sleeve, for kids carrying a genuinely heavy daily load. |
| Commute | 44 x 28 x 14cm, 18L | Built for transit, not just school. Carry handles like a tote, backpack straps, or slip it over a suitcase handle, with a dedicated laptop compartment and a zip pocket just for a phone. |
On the phone pouch pocket in Flex: more Australian high schools are running phone-free policies now, and Yondr, PhoneLocker and Salus Pouch are the three locking pouch systems we see most. They all work the same way, the phone locks in, stays with the student, and gets unlocked at a station at school. Whichever one your school uses, the pocket's sized to fit it.
Which Lunch Bag Fits Which Backpack
The lunch bag is usually the bulkiest thing in a school bag, so it's worth checking it fits before the first day, not on the first morning. We've tested every Spixal lunch bag inside every Spixal backpack. Here's what fits, and the pairing we'd actually choose for school lunches.
| Backpack | Lunch bags that fit inside | Our recommendation |
|---|---|---|
| Junior | Junior lunch bag, Commute Lunch Bag, Insulated Lunch Tote Bag | The Junior lunch bag for preschool and daycare kids. For early primary school and bigger appetites, pick the Commute Lunch Bag. |
| Axis | Junior lunch bag, Commute Lunch Bag, Insulated Lunch Tote Bag, Insulated Cooler Tote Bag | For school, the Insulated Lunch Tote Bag, because it leaves more room in the backpack for books. The Commute Lunch Bag suits too. For the park, the beach or travelling with kids, the larger Insulated Cooler Tote Bag fits as well. |
| Daily | Junior lunch bag, Commute Lunch Bag, Insulated Lunch Tote Bag, Insulated Cooler Tote Bag | The Commute Lunch Bag or the Insulated Lunch Tote Bag. |
| Momentum | Junior lunch bag, Commute Lunch Bag, Insulated Lunch Tote Bag, Insulated Cooler Tote Bag | The Commute Lunch Bag or the Insulated Lunch Tote Bag. |
| Flex | Junior lunch bag, Commute Lunch Bag, Insulated Lunch Tote Bag | The Commute Lunch Bag is the best fit. |
| Commute | Junior lunch bag, Commute Lunch Bag, Insulated Lunch Tote Bag | The Commute Lunch Bag is the best fit. |
Not sure which lunch bag is which? The Commute Lunch Bag has an insulated main compartment and a separate base compartment for an ice pack. The Insulated Lunch Tote Bag (21 × 10 × 20cm) has a leakproof PEVA lining that holds ice. The larger Insulated Cooler Tote Bag has the same lining and doubles as a cooler bag for picnics and the beach. For the full comparison, read our guide to choosing the best insulated lunch bag.
Watch: The Backpacks Up Close
Easier to see than describe. Here's the Axis with its laptop sleeve, and the Flex for high school.
What Actually Has to Fit Inside
Before you buy, run the actual daily load past the bag, not the empty bag on its own:
- Lunch bag and bento
- Kids water bottle
- Library book and homework folder
- A jumper or spare layer
- Hat, clipped on the outside where it won't get forgotten
That last one is why every Spixal preschool and primary backpack has a D-ring on the outside for the magnetic hat clip. A hat buried at the bottom of the bag is a hat that gets left behind.
Compare the Range by Stage
| Stage | Range | Best for |
|---|---|---|
| Daycare / preschool | Junior character (Monster Truck, Unicorn, Butterfly, Dinosaur, Astro Cat, Let's Play) | Small bodies, a design they're excited to carry, D-ring for the hat clip |
| Primary through lower high school | Axis (8 colourways) | Everyday durability, laptop sleeve, room for the full daily kit, still has the D-ring |
| High school | Daily, Flex, Momentum, Commute | Bigger capacity, a more grown-up look. Flex has the locking phone pouch pocket, Commute leans work-and-uni style for teens who want something that doesn't read as a "kid bag" |
Not sure which stage your child's actually at, or want the backpack to match the rest of the kit? Pair it with a kids lunch box and lunch bag built to fit inside the same bag, so packing the day is one job, not ten.
FAQs
What is the best school backpack for kids in Australia?
The right size for their stage. Spixal sizes its kids backpacks by stage: the 25L Spixal Junior (400g empty) for daycare to the first years of school, the 28L Spixal Axis Kids Backpack with a laptop sleeve for primary school, and The Daily, Flex, Momentum and Commute for high school. Every Spixal backpack has a 12-month warranty.
What is the best school bag for primary school in Australia?
One with padded straps, a bottle pocket and room for the lunch bag, library book and jumper. The 28L Spixal Axis Kids Backpack is sized for an Australian primary school day, with a laptop sleeve, a bottle pocket that fits up to 1L, and a matching library bag and pencil case.
What is the best school bag for Year 7?
A bag with room for a full Year 7 timetable that still looks right in Year 12. Every Spixal high school backpack fits a 15-inch laptop and has padded straps. Good fits for Year 7 are the 28L Spixal Axis Kids Backpack or the 26L Spixal Flex, which has two main compartments and a pocket for a locking phone pouch. For heavy sport days, the 36L Spixal Momentum is our largest backpack.
What size backpack does my child need?
Match it to torso length, not age. Daycare and preschool need a small, light bag. Primary needs room for the daily lunch-and-library kit without swamping a small back. High school needs real capacity for books and a laptop.
Isn't 28L too big for a primary school backpack?
It's not, and here's the actual reason. Some size guides you'll find online suggest 10 to 20L for primary school, but those numbers are usually based on school systems where kids have lockers and a cafeteria, so the bag only has to carry a pencil case and a folder, not a full day's kit. Australian primary kids carry everything to and from school every day, no locker, no cafeteria. Axis is sized at 28L specifically so the lunch bag, drink bottle, library book, homework folder, pencil case and a winter jumper all actually fit. The jumper's the one people don't think about, going straight in the bag is genuinely the best way to stop it getting lost, and there isn't a smaller bag that does that job properly. We didn't pick 28L for the sake of it. It's the size that fits what an Australian primary school day actually requires.
How much should a packed school backpack weigh?
Around 10 to 15 percent of your child's body weight, fully packed. If they're leaning forward to walk, it's too heavy for them right now.
Do kids' backpacks need a chest strap?
From primary school onward, yes. It keeps the bag sitting centred instead of sliding off one shoulder all day.
How long should a school backpack last?
At least a full school year, ideally two to three for a well-built one. Zips and strap stitching are usually the first sign a bag's on its way out.
How do I fit a school backpack properly?
Loosen the straps, put it on with both straps, tighten until the bag sits snug and high against the back with the base above the hips, then clip the chest strap. Pack the heaviest things closest to the back. Re-check the fit every term.
Which lunch bag fits inside a Spixal backpack?
Every Spixal backpack fits the Junior lunch bag, the Commute Lunch Bag and the Insulated Lunch Tote Bag. The Axis, Daily and Momentum also fit the larger Insulated Cooler Tote Bag. For school lunches we recommend the Junior lunch bag for preschool and daycare, the Insulated Lunch Tote Bag with the Axis so there's more room for books, the Commute Lunch Bag or Insulated Lunch Tote Bag for the Daily and Momentum, and the Commute Lunch Bag for the Flex and Commute backpacks. For days at the park, the beach or travelling, the Insulated Cooler Tote Bag fits inside the Axis too.
What warranty do Spixal backpacks have?
Every Spixal backpack has a 12-month Made To Last warranty covering defects in materials and workmanship, plus 30-day free returns within Australia if it isn't right for your child.
Does the Flex Backpack fit a Yondr pouch?
Yes, and it also fits PhoneLocker and Salus Pouch. The dedicated pocket is sized for any of the common Australian school locking phone pouches, not just one brand.
Related reads: the ultimate guide to choosing the best insulated lunch bag, the hat clip story, best Kindergarten backpack, best high school backpack, matching backpack and lunch bag sets.
Shop school bags for primary and high school or the full kids backpack range.