Kids BJJ Gi Buying Guide: Everything Parents Need to Know
Kids BJJ Gi Buying Guide: Everything Parents Need to Know
Your child has started Brazilian Jiu-Jitsu — brilliant. Now comes the first big gear decision: buying their gi. With so many options on the market, it can feel overwhelming, especially if you're new to the sport. This guide cuts through the noise and tells you exactly what to look for when buying a kids BJJ gi.
Why the Right Gi Matters for Kids
A well-fitting, durable gi isn't just about looking the part. For young grapplers, the right gi affects comfort during training, freedom of movement during techniques, and how long the gear lasts before needing replacement. Kids grow fast and train hard — their gi needs to keep up.
Understanding Kids BJJ Gi Sizes
Kids BJJ gis use a different sizing system to adult gis. Rather than A0–A6, children's gis typically use an M-series sizing system based on age and height. Here's a general guide:
- M0000 — Ages 3–4, approx. 100–110cm height
- M000 — Ages 4–5, approx. 110–120cm height
- M00 — Ages 5–6, approx. 120–130cm height
- M0 — Ages 6–7, approx. 130–140cm height
- M1 — Ages 7–8, approx. 140–150cm height
- M2 — Ages 9–10, approx. 150–160cm height
- M3 — Ages 11–12, approx. 160–170cm height
- M4 — Ages 13–14, approx. 170–175cm height
Always measure your child's height and weight before purchasing, and check the specific brand's size chart. Sizing can vary between manufacturers.
Should You Size Up?
This is one of the most common questions parents ask. The temptation is to buy a size up so the gi lasts longer — but this can backfire. A gi that's too large will bunch up, restrict movement, and make it harder for your child to learn techniques correctly. It can also become a safety issue during rolling.
Our recommendation: buy the correct size for now. A well-fitting gi will serve your child better in training, and most kids' gis are priced affordably enough that replacing them as your child grows isn't a major expense.
Fabric and Weight
Kids BJJ gis are typically made from cotton or a cotton blend. The fabric weight (measured in GSM — grams per square metre) affects durability and comfort:
- Lighter fabrics (under 350gsm): Cooler and more comfortable, but less durable. Better for younger children in casual training.
- Mid-weight fabrics (350–450gsm): The sweet spot for most kids. Durable enough for regular training, comfortable enough for long sessions.
- Heavier fabrics (450gsm+): Maximum durability, but can feel stiff and warm. Better suited to older kids who train frequently.
For most children starting out, a mid-weight cotton gi strikes the right balance between durability and comfort.
Key Features to Look For
Reinforced Stitching
Kids are rough on their gear. Look for gis with reinforced stitching at stress points — the collar, armpits, and knee areas of the trousers. Double or triple stitching in these areas significantly extends the life of the gi.
Comfortable Collar
The collar is one of the most gripped areas in BJJ. A rubberised or EVA foam collar holds its shape better over time and is more comfortable against the neck during training.
Drawstring Trousers
Make sure the trousers have a secure drawstring that your child can tie themselves. Elastic waistbands alone may not hold up during active rolling.
Pre-Shrunk Fabric
Cotton gis can shrink significantly in the wash. Look for pre-shrunk fabric, and always follow the care instructions — cold wash and hang dry to minimise shrinkage.
Gi Colour: Does It Matter?
For most kids' classes and recreational training, any colour gi is fine. However, if your child is planning to compete, check the competition rules first. Most BJJ competitions for kids accept white, blue, and black gis. Some organisations are stricter than others, so it's worth checking before you buy.
How to Care for a Kids BJJ Gi
Proper care extends the life of the gi significantly:
- Wash after every training session — never leave a damp gi in a bag
- Cold wash (30°C or below) to prevent shrinkage and colour fading
- Do not tumble dry — hang dry naturally
- Do not bleach
- Do not iron directly on logos or patches
How Many Gis Does Your Child Need?
If your child trains two or more times per week, having two gis is ideal. This allows one to be washed and dried properly while the other is ready for the next session. Training in a damp or unwashed gi is unhygienic and can contribute to skin infections.
Belt Not Included
Most BJJ gis are sold without a belt. Your child's academy will typically provide or recommend the correct belt when they start. White belt is the starting point for all beginners in BJJ.
Final Checklist Before You Buy
- ✓ Measure your child's height and weight
- ✓ Check the brand's specific size chart
- ✓ Look for reinforced stitching at stress points
- ✓ Choose mid-weight cotton for most kids
- ✓ Check competition colour rules if relevant
- ✓ Consider buying two gis if training multiple times per week
- ✓ Follow cold wash and hang dry care instructions
Getting the right gi from the start sets your child up for comfortable, confident training. Take your time, measure carefully, and invest in quality — it makes a real difference on the mat.