When many people choose a BJJ Gi size, the first thing they look at is the size name, such as A1, A2, or A3.
But actually, A1, A2, and A3 are only size names. They do not mean fixed measurements.
What really decides how a Gi fits is not the size name, but the full size chart behind it.
Even if two Gis are both called A2, the actual fit can be very different from one brand to another. Some may have a wider jacket, some may have longer sleeves, some may have slimmer pants. Some are made more for competition, while others are better for regular training.
So in custom BJJ Gi production, the size name is only a code for communication. When the factory starts production, what really matters is the measurement of each part.
A size chart is not just a size name
A BJJ Gi normally includes two parts: the jacket and the pants.
For the jacket, we usually look at:
Chest
Jacket length
Sleeve length
Sleeve opening
Shoulder or upper arm width
For the pants, we usually look at:
Pants length
Waist
Thigh width
Inseam
Leg opening
All these measurements together form the real Gi size.
So when we say a Gi is A2 or A3, it is not just a simple size name. Behind that name, there is a full set of measurements.
If you only look at A2 or A3 without checking the actual measurements, it is easy to have size problems.
For example, a customer may fit perfectly in one brand’s A2, but when they try another brand’s A2, the sleeves may be too long, the pants may be too wide, or the whole jacket may feel too big.
This does not mean the customer chose the wrong size. It simply means different size charts are not the same.
Why many Gi sizes are not accurate
Many factories can produce BJJ Gis, but not every factory has a complete BJJ Gi size chart.
Because Gi sizing cannot be done well just by calculation.
It needs many years of production experience, fitting feedback, customer adjustments, and orders from different markets.
Some factories use a very general size chart to keep things simple. In simple words, they make the Gi a little bigger and looser.
The good thing is that most people will not find it too small.
But the problem is that it may only be “wearable”, not truly well-fitted.
For example, the jacket can be worn, but the sleeves are too long. The pants can be worn, but the thighs are too wide. The measurements may look okay on paper, but the Gi does not look sharp when worn.
For a normal training uniform, some customers may still accept it.
But for a BJJ Gi, size and fit are very important, because they affect how the Gi feels during training and also affect the customer’s first impression of the brand.
A complete size chart takes time to build
A BJJ Gi size chart is not only A0, A1, A2, A3, and A4.
Many markets also need more detailed size options.
For example, some people are tall but not very wide, so they need a long size.
Some people are stronger and wider, but not very tall, so they need a husky size.
Some people may fit one size for the jacket, but another size for the pants.
That is why many brands now do not only use regular A sizes. They also add sizes like A1L, A2L, A2H, A3H, and other more detailed options.
These sizes are not made by simply making the Gi bigger or smaller.
Between each size, the chest, jacket length, sleeve length, pants length, waist, and thigh width all need to have the right proportions.
If you only enlarge A2 into A3, or shrink A3 into A2, the final fit can easily be wrong.
That is why a good Gi size chart takes a long time to build.
It is not just a simple table. It is the result of many years of real production, customer feedback, and continuous adjustment.
Where our size charts come from
We do not only do OEM production.
We have also built our own BJJ brand, and we have worked for many years with different BJJ clubs, teams, and brands around the world.
Over the years, we have worked with customers from many different markets and produced Gis with different fits and size requirements.
That is why we have built a relatively complete BJJ Gi size chart system.
It includes not only regular adult sizes, but also long sizes, husky sizes, kids’ sizes, women’s sizes, and other common size options used in different markets.
These data were not created overnight.
They come from long-term orders, sample adjustments, customer feedback, and real production experience.
If the customer already has their own size chart, we can produce according to their measurements.
If the customer does not have a complete size chart yet, we can provide a suitable size base from our existing size charts, based on their market and product positioning.
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