10 Steps to Find the Right BJJ Rash Guard Size

Oct 07, 2023

The 10 Steps to Find the Right BJJ Rash Guard Size

In the world of Brazilian Jiu-Jitsu (BJJ), a properly fitting rash guard is essential for both comfort and performance on the mat. Whether you are a beginner or a seasoned practitioner, choosing the right size BJJ rash guard can make all the difference in your training experience. This article will guide you through the process of selecting the perfect fit, taking into account factors such as fabric stretch, body measurements, and personal preferences. With our informative and practical advice, you will be equipped to make a confident decision and enjoy the benefits of a properly sized rash guard in your BJJ journey.

How To Choose The Right Size BJJ Rash Guard?

Importance of Choosing the Right Size

When it comes to BJJ rash guards, choosing the right size is crucial for a comfortable and effective training experience. Wearing the wrong size can lead to discomfort and restriction, hindering your ability to perform at your best. It can also cause skin irritation and chafing, which can be both painful and distracting. Therefore, taking the time to find the perfect fit is essential for your overall satisfaction and performance on the mat.

Understanding Size Charts

One of the challenges in choosing the right size BJJ rash guard is that different brands may have different sizing. A size medium from one brand might be equivalent to a size large from another. This is why it's important to refer to the brand's size chart when making your decision. These charts provide measurements for each size, allowing you to accurately determine which size will best fit your body. When using a size chart, it's important to take your own measurements to ensure accuracy. Start by measuring your chest, waist, and arm length. These measurements will serve as a guide for selecting the right size. It's also essential to consider your fit preference, whether you prefer a tight or loose fit. This will impact the size you choose, as different brands may have different definitions for their fit categories.

Factors to Consider

In addition to size charts, there are several factors to consider when choosing the right size BJJ rash guard. One important factor is the fabric's stretch and flexibility. Some rash guards offer more stretch than others, and this can affect how they feel and fit on your body. If you prefer a more compressive fit, you may opt for a rash guard with less stretch. On the other hand, if you prefer a looser fit for added comfort, a rash guard with more stretch may be the better choice. Another factor to consider is your fit preference for grappling or striking. Grappling-focused rash guards tend to have a tighter fit to prevent grabbing or snagging during training. Striking-focused rash guards, on the other hand, may have a looser fit to allow for greater freedom of movement. Depending on your training style and preferences, you may lean towards one type of fit over the other. Lastly, it's important to consider the intended use of the rash guard. If you plan on using it for competition, you may want to choose a size that conforms to any specific regulations or requirements. On the other hand, if you're using the rash guard for training or casual wear, you may prioritize comfort and flexibility over strict size guidelines.

Sizing Recommendations by Brand

To help you in your search for the perfect size BJJ rash guard, here are some sizing recommendations for top brands in the industry:
  1. Brand A: This brand's rash guards tend to run true to size. It's recommended to refer to their size chart and take your measurements to ensure the best fit. Customer feedback suggests that if you're in between sizes, it's generally better to size up for a more comfortable fit.
  2. Brand B: This brand offers a range of fits, from tight to loose. It's important to refer to their size chart and consider your fit preference when choosing a size. If you prefer a tighter fit, you may opt for your usual size. If you prefer a looser fit, sizing up may be the better option.
  3. Brand C: This brand's rash guards tend to run slightly smaller than average. It's advisable to size up when purchasing from this brand, especially if you're in between sizes. Checking customer reviews and feedback can also provide valuable insights into the brand's sizing and fit.
Remember, these are just general recommendations and may vary based on individual body types and preferences. It's always best to refer to the brand's specific size chart and take your own measurements for the most accurate sizing guidance.

Trying On and Assessing Fit

Once you receive your BJJ rash guard, it's important to try it on and assess the fit. There are a few key things to consider during this process: First, check for ease of movement. The rash guard should allow you to move freely and comfortably without any restrictions. Test different movements, such as reaching overhead and performing various grappling or striking techniques, to ensure the rash guard doesn't limit your range of motion. Second, ensure proper coverage. The rash guard should adequately cover your torso and arms without any excess fabric or gaps. This is especially important for preventing rashes and protecting your skin during training. Pay attention to the length of the sleeves and the overall length of the rash guard to ensure a proper fit. Lastly, avoid excessive looseness or tightness. While personal preferences may vary, a rash guard that is excessively loose may not provide the desired compression and support. Conversely, a rash guard that is excessively tight may restrict movement and cause discomfort. Finding the right balance is key for both performance and comfort.

Common Sizing Mistakes to Avoid

When it comes to choosing the right size BJJ rash guard, there are a few common mistakes to avoid: First and foremost, avoid guessing the size. Guessing can lead to a poor fit and potential dissatisfaction with the product. Take the time to measure your body and refer to the brand's size chart for accurate sizing guidance. Second, don't ignore the brand's size chart. Each brand may have its own unique sizing system, so relying solely on your usual size may not guarantee the best fit. Always consult the brand's size chart and follow their recommendations for a more accurate fit. Lastly, don't forget to consider your body proportions. Not all bodies are created equal, and what fits well on one person may not fit the same on another. If you have longer arms or a broader chest, for example, you may need to adjust the size accordingly to ensure the best fit.

Additional Tips and Considerations

Here are some additional tips and considerations to keep in mind when choosing the right size BJJ rash guard:
  1. Review customer feedback and recommendations: Reading customer reviews and feedback can provide valuable insights into a brand's sizing and fit. Look for reviews from individuals with similar body types and preferences to get a better understanding of how the rash guard might fit you.
  2. Consult with other BJJ practitioners: Reach out to fellow BJJ practitioners, whether online or in-person, to get their recommendations and insights on sizing. They may be able to offer valuable advice based on their own experiences with different brands and sizes.
  3. Consider potential shrinkage after washing: Some rash guards may shrink slightly after washing, so it's important to take this into account when choosing a size. If you're in between sizes, you may want to size up to accommodate any potential shrinkage.

When in Doubt, Seek Expert Help

If you're still unsure about which size BJJ rash guard to choose, don't hesitate to seek expert help. There are two primary avenues for assistance:
  1. Contact the brand's customer service: The brand's customer service team can provide guidance and answer any specific questions you may have regarding sizing. They have the expertise to help you find the perfect fit based on your measurements and preferences.
  2. Visit a local BJJ gear store for assistance: If possible, visit a local BJJ gear store and bring your measurements with you. The knowledgeable staff can help you try on different sizes and brands, providing personalized recommendations based on their expertise.


Choosing the right size BJJ rash guard is essential for optimal comfort, performance, and overall satisfaction. By understanding size charts, considering your fit preferences, and taking your measurements, you can ensure a better chance of finding the perfect fit. Remember to avoid common sizing mistakes, assess the fit properly, and take advantage of additional tips and considerations. When in doubt, don't hesitate to seek expert help from the brand's customer service or a local BJJ gear store. With the right size rash guard, you can train with confidence and focus on your BJJ journey.