Starting Brazilian Jiu Jitsu is exciting for both kids and parents — but choosing the right gi can sometimes feel confusing, especially if it’s your child’s first time training.
From sizing to comfort and durability, there are a few important things to consider before buying a junior BJJ gi.
At Hyperfly Australia, we’ve helped hundreds of Australian families find the right fit for training, competition and everyday use. Here’s everything you need to know before choosing a gi for your child.
What Is A BJJ Gi?
A BJJ gi is the traditional uniform worn in Brazilian Jiu Jitsu training and competition.
A gi includes:
- A jacket
- Gi pants
- A belt
Kids wear their gi during class, sparring and competitions, so comfort and durability are extremely important.
What Makes A Good Junior BJJ Gi?
Not all junior gis are built the same.
When choosing a gi for your child, we recommend looking for:
Comfort
Kids train best when they feel comfortable. Lightweight gis are easier to move in and feel less restrictive during class.
Durability
A good gi should handle regular training, washing and the wear that comes with active kids training weekly.
Proper Fit
A gi that’s too big can feel awkward, while one that’s too small can become uncomfortable quickly as kids grow.
Easy Maintenance
Parents appreciate gis that are easy to wash, dry and maintain between training sessions.
What Size Gi Should You Choose?
Sizing is one of the most common questions parents ask.
As a general guide:
| Size | Approx Age |
|---|---|
| J0 | 2–4 years |
| J1 | 4–5 years |
| J2 | 5–6 years |
| J3 | 5–7 years |
| J4 | 7–9 years |
| J5 | 9–11 years |
| J6 | 10–14 years |
| J7 |
12-15 years |
Every child grows differently, so height and build also matter.
If your child is between sizes or still growing quickly, we usually recommend sizing up for longer use.
If you’re unsure, contact our team and we’ll happily help recommend the best fit.
You may have seen M sizes around before , here's a easy convertor
M0000 ➔ Junior 0 M000 ➔ Junior 1 M00 ➔ Junior 2
M0 ➔ Junior 3 M1 ➔ Junior 4 M2 ➔ Junior 5
M3 ➔ Junior 6 M4 ➔ Junior 7 M5 ➔ Junior 8
Lightweight vs Heavyweight Gis
For most kids, lightweight gis are the best option.
Lightweight gis:
- Feel more comfortable
- Dry faster
- Allow easier movement
- Are great for regular training
Heavier competition-style gis can feel stiffer and warmer, especially for younger kids training multiple times per week.
That’s why many families choose lightweight options like the Hyperfly Hyperlyte series for junior training.
Best Beginner BJJ Gi For Kids
If your child is just starting Jiu Jitsu, a beginner-friendly bundle is often the easiest option.
Our junior starter kits are designed to make things simple for parents by including:
- A premium lightweight gi
- Matching rash guard
- No-gi shorts
- Great overall value
These bundles are perfect for new students starting their first classes.
Should Kids Train In The Same Gi Every Day?
If your child trains multiple times per week, having a second gi can be helpful.
This allows:
- One gi to dry fully after washing
- Less wear on a single uniform
- Backup for competitions or grading days
Many families start with one gi and add a second later once training becomes more regular.
Choosing A Gi That Lasts
Kids grow quickly, but quality still matters.
A well-made gi will:
- Stay comfortable after washing
- Hold its shape better
- Last longer through training
- Feel better during class
At Hyperfly Australia, our junior range is designed for comfort, durability and long-term use — whether your child is just starting or already training regularly.
Shop Junior BJJ Gis In Australia
Looking for the right junior gi? contact us for help with sizing
Explore our range of lightweight junior BJJ gis, starter bundles and training gear designed for kids training Brazilian Jiu Jitsu across Australia.
