Size Guide
Finding the right fit is important whether you're training, competing, or wearing your gear every day.
Use the size charts below as a general guide. If you're between sizes, consider how you prefer your gear to fit:
-
For a tighter, competition-style fit: size down when appropriate.
-
For a more relaxed fit: size up.
-
For rashguards: chest measurement is the most accurate sizing method.
-
For gis: weight and height recommendations should be used together for the best fit.
Jiu-Jitsu Gi Sizing
Our Classic Gi vis designed with a balanced athletic cut suitable for both training and competition.
Recommended Fit
- Use both height and weight to determine your size.
- If you're broad-shouldered or carry more muscle mass, consider sizing up.
- If you're between sizes and prefer a more fitted competition cut, choose the smaller size.
Gi Measurements

Gi Features
- 380 GSM Pearl Weave Jacket
- Reinforced stress points
- Competition-ready fit
- Preshrunk fabric for improved consistency
Rashguard Sizing
All Knowledge rashguards feature a compression fit designed for grappling, training, and active performance.
Recommended Fit
- Measure around the fullest part of your chest.
- Chest measurement is more accurate than weight alone.
- Weight ranges are provided as a general reference.
- If you prefer less compression or are between sizes, size up.
Rashguard Measurements

Rashguard Features
- Compression athletic fit
- Four-way stretch fabric
- Flatlock stitching
- Designed for No-Gi, Gi training, and general fitness
T-Shirt Sizing
Our t-shirts are designed for everyday wear with a comfortable, true-to-size fit.
Β
* Chest measurement is the most accurate way to choose your size. Weight ranges are provided as a general reference and may vary based on height and body composition.
Still Not Sure?
If you're unsure which size to choose, contact us at info@allknowledgejourney.com with your height, weight, and preferred fit, and we'll be happy to help.
Enjoy the journey.
Β SEEK KNOWLEDGE. GROW STRONG.