Kids’ BJJ Gi Sizing: Essential Guide for a Perfect Fit

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Kids wearing BJJ Gis

Brazilian Jiu-Jitsu (BJJ) has become increasingly popular among kids as a martial art and a discipline that not only develops physical abilities, but also instills values such as respect, self-confidence, and perseverance. To fully benefit from practicing this sport, it is essential for children to wear the appropriate gear, specifically, a well-fitted BJJ gi. Proper sizing can be a challenging aspect for parents, as each brand has its unique sizing chart and children grow at different rates.

In this article, the focus will be on understanding the key factors to consider when selecting the right size of a BJJ gi for kids, ensuring their comfort and safety during training and competition. By learning how to accurately measure a child’s body and navigate various brand sizing charts, parents can make informed decisions that will positively impact their young martial artist’s experience in the world of Brazilian Jiu-Jitsu.

It is crucial to recognize that a good fitting gi not only affects performance but also plays a role in injury prevention, as loose or overly tight uniforms can constrain movement and lead to accidents. The process of determining the correct gi size might entail some trial and error, but with patience and persistence, parents can help their children thrive in their martial arts journey.

Understanding BJJ Gi Sizes

Choosing the right BJJ gi size for kids is crucial for their comfort, safety, and performance during training and competition. Gi sizes often range from M0 to M4 for children and A0 to A6 for adults. This section will explain how to properly determine the correct gi size for kids.

First, it’s essential to understand that each brand may have a different sizing system. Therefore, it’s advisable to consult the specific brand’s gi size chart when making a purchase. BJJ gi size charts typically use information such as height, weight, and age to recommend the right size for kids.

To find the most accurate size, start by measuring the child’s height and weight. Next, use these measurements to reference the gi size chart provided by the manufacturer or retailer. Keep in mind that some brands may have a broader range of sizes to accommodate different body types.

When selecting a BJJ gi for kids, it’s important to consider growth and the amount of shrinkage the gi may experience after washing. Some gis are pre-shrunk, while others may shrink up to 10% after washing and drying. If you expect that the gi will shrink or the child might grow soon, consider going one size up.

Quality is another crucial aspect when choosing a kids’ BJJ gi. Ensure the gi has durable stitching, comfortable fabric, and the necessary reinforcements in high-stress areas like the knees and lapels.

Here is a general breakdown of kids’ BJJ gi sizes along with recommended height and weight ranges:

  • M0: Height: 3’3″ – 3’6″, Weight: 30 – 40 lbs
  • M1: Height: 3’7″ – 3’10”, Weight: 40 – 60 lbs
  • M2: Height: 3’11” – 4’2″, Weight: 60 – 80 lbs
  • M3: Height: 4’3″ – 4’8″, Weight: 80 – 100 lbs
  • M4: Height: 4’9″ – 5’2″, Weight: 100 – 125 lbs

Remember that these size ranges are a general guide, and specific brands may vary. Always consult the bjj gi size chart provided by the manufacturer or retailer, and consider factors like growth and shrinkage for the best fit.

Importance of Proper Gi Size For Kids

two BJJ Kids and their coach

Choosing the right size of BJJ gi for kids is crucial for their comfort and overall performance in training sessions and competitions. A properly sized gi ensures that the child feels confident while practicing and allows them to focus on honing their skills.

One of the main reasons to opt for a well-fitted gi is the comfort it provides. An ill-fitted gi can create a sense of unease and restrict the child’s movement. In turn, this may cause the child to lose interest in the sport or not perform at their best during training.

Range of motion plays a significant role in any martial art, and Brazilian Jiu-Jitsu is no exception. A properly sized gi allows kids to move freely, thereby improving their range of motion. Practicing techniques and maneuvers while wearing a gi that feels too tight or too loose can hinder muscle memory development and overall progression.

Additionally, the precise fit of a uniform gives kids a sense of discipline and belonging, as it showcases their commitment to meticulously following the sport’s rules and traditions. Moreover, a well-fitted gi boosts the child’s confidence both on and off the mat. Knowing that they look good and are abiding by the standards set by their peers and instructors will make the child more eager to participate in classes and tournaments.

When it comes to the actual practice of BJJ, the correct gi size significantly influences a child’s technique execution. A loose or tight uniform may cause difficulty in performing certain techniques, such as grips and submissions. Additionally, the opponent may take advantage of an ill-fitting gi to get better grips and control over the child, placing them at a disadvantage during sparring or competitions.

In conclusion, the importance of proper gi size for kids should not be overlooked. A well-fitted uniform not only promotes comfort, range of motion, and discipline, but it also boosts confidence, technique execution, and overall performance. By carefully selecting the right size for their gi, parents and coaches can set their children on the path to success in the art of Brazilian Jiu-Jitsu. For more info on gi sizing in general, click here.

Measuring for the Perfect Fit

Sleeve Measurement

To find the perfect fit for a kids’ BJJ gi, start by measuring the sleeve length. Use a measuring tape to measure the distance from the shoulder seam to the end of the wrist. Make sure the arm is slightly bent during this process. Use the provided size chart from the gi manufacturer to compare the measured sleeve length with their recommendations.

BJJ Gi Pants Sizing

Next, focus on the BJJ gi pants sizing. Measure the waist circumference by wrapping the measuring tape around the narrowest part of the child’s waist. Then, measure the inseam by taking the measurement from the crotch down to the ankle. Always refer to the manufacturer’s size chart to match the measurements with the appropriate size. Keep in mind the child’s height and weight while doing so, as it may influence the overall fit of the gi.

Selecting Size for Unique Body Types

For unique body types, consider factors such as height, weight, and body measurements. An individual may have a smaller or larger build compared to others in their age group. Compare the child’s measurements with the size chart, looking closely at the height and weight columns.

Remember that:

  • Kids with shorter stature and lighter body weight might require a smaller size.
  • Kids with taller stature and heavier body weight might require a larger size.

Additionally, account for potential growth spurts and select a gi that allows for some flexibility in sizing. Keep in mind that many gi manufacturers offer their products in half sizes, which can be helpful for kids that fall between standard size categories. In the end, selecting the right BJJ gi size for kids ensures training comfort and optimal performance on the mat.

Kids BJJ Gi Brand Comparisons

When it comes to purchasing a BJJ gi for your child, there are several reputable brands to consider, each offering unique features and sizing options. Among the top contenders for kids’ BJJ gi manufacturers are Sanabul, Fuji, and Scramble.

Sanabul is known for its affordable and high-quality gis. They offer a variety of sizes for kids, catering to different age groups and body types. Many kids’ gis from this brand utilize a lightweight pearl weave, which provides both comfort and durability. Sanabul also offers a range of colors and designs, making it an attractive option for young practitioners.

Fuji is another well-regarded gi brand in the BJJ community, offering a wide range of gis for kids. Their gis are made with a strong, yet lightweight, fabric that is easy for kids to move in. The brand offers several sizes to accommodate all children, from those with smaller builds to those who are taller. This ensures a good fit for everyone without compromising the integrity of the gi.

Scramble stands out with its modern and stylish designs that appeal to younger BJJ practitioners. The brand uses high-quality fabrics in their gis, offering a good balance between weight and durability. Many of their gis for kids feature a pearl weave fabric, providing the necessary strength without being too heavy. Scramble offers a range of sizes to ensure the ideal fit for all children, similar to other top brands.

While each brand brings something unique to the table, they all prioritize quality and functionality in their kids’ BJJ gis. Carefully considering the specific needs and preferences of your child, alongside the features offered by each brand, can help you make an informed decision when purchasing a gi.

Material and Weaves

When choosing a kids’ BJJ gi, one of the important aspects to consider is the material and weave of the gi. In this section, we will discuss the different types of materials used in BJJ gis, the types of weaves, and compare lightweight and heavy gis.

Lightweight Vs Heavy Gis


Most gis are made from cotton, which is known for its durability, comfort, and breathability. Some gis may use a blend of materials, like cotton and polyester. The blend can offer additional benefits, such as better moisture management and improved durability.

Weave Types

One of the primary aspects that determine the weight and feel of a gi is the weave. The most common weave for BJJ gis is the pearl weave. It is relatively lightweight and allows for excellent mobility, which is crucial for children as they learn the art of Brazilian Jiu-Jitsu. Pearl weave gis are known for their balance of durability and comfort.

Lightweight gis offer the advantage of being easier to move in and are often less expensive than their heavier counterparts. They can be beneficial for young practitioners who are still growing and may outgrow their gis quickly. The downside to lightweight gis is that they may be less durable than heavy gis.

Heavy gis, on the other hand, are noted for their durability and sturdiness. They can endure the rigors of intense training and competition. However, they may be less comfortable due to their weight and may restrict movement.

In conclusion, choosing the right material and weave for a kids’ BJJ gi depends on the individual’s needs and preferences. Both lightweight and heavy gis have their advantages and disadvantages, so carefully consider the specific requirements of the young practitioner before making a decision.

Tips for Gi Care

When it comes to taking care of your kids’ BJJ gi, proper care and maintenance can help prolong the life and appearance of the garment. In this section, we will explore understanding shrinkage and provide helpful tips for gi care.

Understanding Shrinkage

Shrinkage is an important factor in maintaining your child’s BJJ gi. Gis can shrink when exposed to hot water or high heat during the washing and drying process. To minimize shrinkage, it is recommended to wash the gi in cold water and avoid using high heat settings. Instead, opt for air drying or use the lowest heat setting on your dryer.

Regular washing and proper care are essential for maintaining good hygiene and preventing the build-up of bacteria or odor. Here are some tips for keeping your child’s gi clean and fresh:

  • Wash the gi after every training session to maintain good hygiene.
  • Use cold water for washing to reduce the risk of shrinkage.
  • Avoid using harsh detergents or bleach, as these can damage the gi and harm its integrity.
  • If you prefer using fabric softener, opt for a gentle, natural option to avoid damaging the gi or causing irritation to your child’s skin.
  • For stubborn stains or odors, consider pre-soaking the gi in a mixture of cold water and a mild detergent before washing.

By following these simple tips for gi care, you can ensure that your child’s BJJ gi remains in great condition and provides them with confidence and comfort during training sessions.