What size grappling shorts should I choose?

An ill-fitting grappling short is a recipe for a terrible session: it slips, restricts your hips, or worse, rips during a guard pass. This guide gives you the exact method to choose the right size the first time, whether you're doing no-gi BJJ, MMA, or pure grappling.

Why the size of grappling shorts is so critical

Unlike regular sports shorts, grappling shorts are subjected to extreme stresses: ground pulls, leg passes, stand-up to ground transitions, constant sweat. A size that's too loose will make them fall off during a sprawl. A size that's too tight will restrict your mobility during open guards and risks ripping at the side seams after only the third session.

The goal is simple: shorts that stay in place without a cord tied too tight, that allow you to pass spider guard unhindered, and that withstand hundreds of machine washes without deforming.

How to measure your waist correctly

The first mistake beginners make is using their jean size. However, grappling shorts are worn lower, on the hips, and the stretchy material behaves differently from denim. Here's the correct method:

Place a tape measure around your waist at your navel, keeping the tape parallel to the floor. Don't pull tight, but don't leave any slack either. Note the measurement in centimeters. Then measure your hip circumference at the widest point of your pelvis. Your shorts size should correspond to the larger of the two measurements, following the brand's size chart (and not a generic chart found on Google).

Generic size chart

Here's a general guideline to help you before checking a brand's official guide:

S: waist 73-78 cm. M: 78-84 cm. L: 84-90 cm. XL: 90-98 cm. XXL: 98-106 cm.

If you're between two sizes, generally choose the larger one: a slightly loose grappling short tightened with the drawstring is better than a short that's too tight and cuts off your circulation. Exception: if you have muscular thighs but a slim waist, some "athletic fit" cuts will be more suitable than sizing up.

Length: a detail that changes everything

Most modern grappling shorts are cut mid-thigh, about 5 cm above the knee. This length is optimal for freedom of movement and compliance with competition rules (CFJJB, IBJJF, ADCC). Shorts that are too long hinder triangles and guard passes. Too short, they constantly ride up and expose the thighs to mat friction.

If you're over 1m85, always check the length indicated in the product description. Some brands design their XL and XXL sizes with proportionally greater length, others do not. Ask customer service if the information isn't clear.

Material and its impact on the cut

Pure polyester shorts will be less stretchy than polyester-spandex blend (4-way stretch) shorts. Modern shorts generally incorporate between 5 and 12% elastane to allow total freedom in guard positions. The higher the stretch percentage, the more you can opt for a fitted size without risking a tear.

Also check the closure system: classic internal drawstring, internal velcro (more secure in competition), or the double drawstring + velcro system which has become the premium standard. Without a good closure, even the right size will slip off your hips as soon as you sweat.

Classic mistakes to avoid

First mistake: taking the same size as your gym shorts. The cuts are radically different. Second mistake: choosing a size "just in case" to anticipate mass gain. Shorts that are too loose wear out faster because they experience more parasitic friction.

Third mistake: relying solely on customer reviews without checking the official chart. Some will say "runs small" because they themselves are between two sizes. Fourth mistake: forgetting to measure after a weight change. If you've gained or lost 5 kg since your last shorts, retake your measurements.

Hustle Fightwear advice

At Hustle Fightwear, our grappling shorts are cut for French and European body types (often with longer legs than US cuts). We use an 88% polyester / 12% spandex blend that guarantees both durability during sprawls and total freedom in guard.

To complete your no-gi outfit, also consider your top: we've published a comprehensive guide on how to choose the right compression shirt size and another on why wear a rashguard in BJJ. You can also explore our rashguard collection to find the perfect combination with your new shorts.

Golden rule: take 2 minutes to correctly measure your size before ordering, and you'll avoid 100% of disappointments. Have a great session on the mats.