You're standing in front of a product page with six weave types, GSM weights ranging from 300 to 1000, sizing suffixes you've never seen before, and a vague mention of IBJJF compliance. You pick one, it arrives, and it's either a sauna suit for your Tuesday night class or it falls apart at the collar seams within three months. That's the BJJ gi buying experience for most first-timers in Australia.
This BJJ gi buying guide cuts through the jargon. Australian climate is a genuine factor in this decision. A 900 GSM double weave in a Queensland summer is a different problem to the same gi in a Melbourne winter. Weave type, GSM weight, sizing, and competition compliance all matter, and they all interact. Get the combination right and your gi lasts years and performs in every session. Here's how to choose correctly.
Understanding Gi Weaves: The Biggest Decision You'll Make
The weave is the construction pattern of the cotton fabric. It determines weight, durability, breathability, and how easy the gi is to grip. Every other decision follows from this one.
Single Weave (300 to 550 GSM)
Single weave is the lightest and most affordable option. The construction is thinner, which makes it more breathable and softer against the skin. For anyone training in Australian summer conditions, a single weave gi is significantly more comfortable than heavier alternatives.
The trade-off is durability and grip resistance. Thinner fabric means opponents can grip it more easily, and it wears faster under regular training. For beginners who are still figuring out whether BJJ is a long-term commitment, or for growing kids who'll need a new gi in six months anyway, single weave is a sensible starting point. For serious competitors or athletes training four or more times a week, it's not the right long-term choice.
Pearl Weave (350 to 550 GSM)
Pearl weave is the industry standard. The tighter construction creates a harder-to-grip surface, better durability, and minimal shrinkage compared to single weave. It's the most common weave across both training and competition gis for good reason.
The GSM range within pearl weave matters. A 350 to 400 GSM pearl weave is the right call for competition and hot-climate training. It's light enough to stay comfortable through a full session in Australian heat while still being durable. A 450 to 550 GSM pearl weave suits all-purpose daily training where longevity is the priority over weight. If you're buying one gi and want it to cover everything, a 400 to 450 GSM pearl weave is the safest default.
Double Weave (650 to 1000 GSM)
Double weave is extremely heavy and extremely durable. It was the competition standard in Brazil for decades before lightweight pearl weave took over. Today it's largely obsolete for competition use and impractical for Australian conditions. Training in a 900 GSM double weave through an Australian summer is a genuine endurance test that has nothing to do with BJJ. Unless you have a specific reason to need maximum durability above all else, double weave is not the right choice for most athletes training in Australia.
Ripstop
Ripstop is ultra-lightweight with a distinctive grid pattern in the weave. It's most commonly used for gi pants, where its tear resistance and light weight are genuine advantages. Some manufacturers incorporate ripstop into jacket construction. It's hard to grip when wet, which some athletes prefer and others find frustrating. Breathability is poor compared to pearl weave. Critically, ripstop is not competition-legal in all organisations. Check the specific rules of any event you plan to enter before buying a ripstop jacket.
Once you've chosen your weave, sizing is the next critical step.
Gi Sizing: Why It's More Complicated Than You Think
BJJ gi sizing is not standardised across brands. The same size designation from two different manufacturers can produce gis that fit completely differently. Buying by size number alone without checking the brand's chart is how you end up with a gi that doesn't fit.
The A-Size System
Adult sizing runs from A0 at the smallest through to A5 or A6 depending on the brand. A0 suits lighter, shorter athletes. A5 and A6 suit larger, taller athletes. The number is a starting point, not a guarantee. An A2 from one brand may fit identically to an A3 from another. Always pull up the brand's specific size chart and cross-reference your height, weight, and arm length before purchasing.
Australian Fit Considerations
Many brands offer suffix variations on their standard sizes. A2L means Adult 2 Long, designed for taller athletes whose weight puts them in an A2 but whose height requires more length in the jacket and pants. A2S is the short cut for the same weight range. Some brands also offer H (Heavy) variations for athletes who carry more weight at a given height.
Buy slightly larger than your ideal fit on the first purchase. All cotton gis shrink in the wash, and the degree of shrinkage varies by weave and brand. Wash cold and line dry to control shrinkage. A gi that fits perfectly before its first wash may be uncomfortably tight after it. Account for that before you order.
Competition vs Training Gis
The gi you train in every day and the gi you compete in serve different purposes. Understanding that distinction saves you money and prevents compliance problems on competition day.
Training Gis
Training gis prioritise durability and comfort. Colour restrictions are minimal in most gym environments. Construction doesn't need to meet competition specifications. A 450 GSM pearl weave in any colour your gym allows is the right tool for daily training. Buy for longevity and comfort, not for compliance.
Competition Gis
IBJJF regulations are specific and non-negotiable. The gi must be white, blue, or black. Jacket and pants must be the same colour. The jacket must reach the thigh when the arms are extended downward. Sleeves must come within 5cm of the wrist. Collar thickness must be 1.3cm or less. Patches and branding must meet placement requirements.
Check the specific rules of your event before purchasing a competition gi. Different organisations have different requirements, and IBJJF rules are updated periodically. A gi that was compliant two years ago may not meet current specifications.
Browse the full range of BJJ gis at FitSet.
What to Look for in Build Quality
Two gis at the same GSM and weave can have dramatically different lifespans depending on construction quality. Know what to inspect before you buy.
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Seam reinforcement at high-stress points is the most important quality indicator. The armpits, collar attachment, and knee panels of the pants take the most punishment in live rolling. Double or triple stitching at these points is the standard for quality gis. Single stitching at stress points is a sign of a gi that won't last.
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Collar construction matters more than most buyers realise. A firmer collar with EVA foam reinforcement is harder for opponents to grip and dries significantly faster after training. Soft, poorly reinforced collars become easy handles for your training partners and stay damp for hours after washing.
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Pants construction is where many budget gis cut corners. A ripstop cotton blend for the pants is lighter and more tear-resistant than pure cotton. Pure cotton pants are heavier and more prone to tearing at the knees under regular guard passing and takedown drilling.
- Stitching colour is cosmetic. Stitching quality is structural. Run your fingers along the seams before you buy if you're purchasing in person. If you're buying online, check the brand's warranty terms. Quality gi manufacturers stand behind their construction.
Browse the full BJJ gi collection at FitSet.
Start With Pearl Weave. Get the Size Right. Train.
For most Australians buying their first or second gi, the answer is straightforward: 400 to 450 GSM pearl weave, sized slightly larger than your measurements suggest, washed cold and line dried. That combination covers daily training, handles Australian conditions across all seasons, and holds up to regular rolling without falling apart at the seams.
What GSM should my first BJJ gi be? ||| For most Australians, 400 to 450 GSM pearl weave is the right starting point. It's light enough for year-round training in Australian conditions, durable enough for regular use, and suitable for most competition formats. If you're training primarily in summer or in a hot climate, lean toward 350 to 400 GSM. @@@ Do I need an IBJJF-legal gi to train? ||| No. IBJJF compliance only matters for IBJJF-sanctioned competitions. Most gyms have no colour or construction restrictions for training. Buy a training gi for comfort and durability, and invest in a competition-compliant gi separately if and when you start competing. @@@ Will my gi shrink in the wash? ||| Yes, all cotton gis shrink to some degree. Pearl weave shrinks less than single weave. The amount of shrinkage depends on wash temperature and drying method. Wash cold and line dry to minimise shrinkage. Avoid machine drying. If you're between sizes, buy the larger size to account for initial shrinkage. @@@ What's the difference between A2 and A2L? ||| A2 is the standard cut for the Adult 2 size range. A2L is the long cut, designed for taller athletes whose weight puts them in the A2 range but who need more length in the jacket and pants. If you're above average height for your weight, check whether the brand offers a long cut before ordering the standard size. @@@ Can I wear a black gi in BJJ competition? ||| In IBJJF-sanctioned events, yes. Black is one of three permitted colours alongside white and blue. However, some local and regional competitions have different rules. Check the specific event's regulations before purchasing a black gi for competition use. @@@ How long should a BJJ gi last? ||| A quality pearl weave gi with reinforced seams, used three to four times per week, should last two to four years. Budget gis with single stitching at stress points often fail within six to 12 months of regular training. The collar and armpit seams are usually the first to go. A gi that's well-constructed and properly cared for is a significantly better investment than replacing a cheap gi every year. @@@