BJJ Gi Size Chart & Complete Sizing Guide

BJJ gis use an alphanumeric sizing system where the letter “A” stands for “Adult” and the number indicates the size within that range. Sizes run from A0 (the smallest adult size) through to A6 (the largest). Children’s gis use the prefix “M” (for Minor), running from M00 through to M4.

This system originated in Japanese martial arts and was adopted by Brazilian Jiu-Jitsu as it grew in the 1990s. Unlike standard clothing where you might wear a medium across most brands, BJJ gi sizing varies significantly between manufacturers. A size A2 from Tatami can fit quite differently to an A2 from Fuji, because there is no single governing body that enforces exact measurements for each size label.

Each size corresponds to a recommended height and weight range. When choosing your size, start with your height, then check that your weight falls within the recommended range. If you sit between two sizes, the general rule is to size up rather than down — a slightly loose gi can be shrunk with a warm wash, but an overly tight gi cannot be stretched.

For a more precise fit, take your body measurements using our step-by-step BJJ gi measurement guide. Arm length, torso length, and chest circumference all play a role in finding the ideal size, especially if your proportions differ from the average.

The table below shows averaged height and weight ranges across the major BJJ gi brands. Use this as a general starting point, then refine with the brand-specific charts further down this page.

When using this chart, find your height first. If your weight sits comfortably within the range for that size, you have found your match. If your weight falls at the upper end or outside the range, consider moving up one size. For those with a lean, tall build, look at Long (L) variants. For broader builds where weight exceeds the range but height does not, look at Husky (H) variants.

A2 and A3 are the most commonly purchased gi sizes in the UK, accounting for the majority of sales. If you are around 178 cm (5’10″) and 80 kg, you will typically fall into the A2 range across most brands.

Men’s BJJ gis are sized A0 through A6 in the standard range. The most popular sizes for men in the UK are A2, A3, and A4, which cover the average male height range of 173–193 cm (5’8″ to 6’4″).

For men with proportionally longer limbs, many brands now offer Long (L) variants such as A1L, A2L, and A3L. These sizes maintain the same chest and waist measurements as their standard counterpart but add 5–8 cm of extra length to the sleeves and trousers. Brands offering L sizes include Tatami (select models), Kingz (Balistico, Classic, Kore, Nano, Sport, Ultralight, and The ONE), 93brand, and Valor Fightwear (A1L through A3L).

For men with broader builds, Husky (H) variants like A2H and A3H provide extra room in the chest, shoulders, and waist without adding length. 93brand is one of the most consistent brands for offering H sizes alongside standard and L options.

If you are between sizes, consider your preferred fit. Competition athletes tend to prefer a tighter fit (size down), whilst those training casually may prefer a roomier fit (size up). Read more about competition gi requirements if you plan to compete.

Women’s BJJ gis are sized using the “F” prefix (F1 through F5, sometimes F0), with cuts specifically designed for the female body. Compared to men’s gis, women’s cuts typically feature a narrower shoulder, shorter torso, extra room through the hips, and a more tapered waist.

Not all brands offer women’s specific gis. Brands with dedicated women’s ranges include Tatami Fightwear, Scramble, Fumetsu, 93brand, Gold BJJ, Elite Sports, Valor Fightwear, and Hyperfly. Some brands like Fuji use a “W” prefix (W0, W1, W2) instead of “F”.

Some women prefer to wear men’s gis, especially if they have a taller build. As a rough guide, a men’s A0 is similar to an F2, a men’s A1 is similar to an F3, and a men’s A2 is similar to an F4. The trade-off is that men’s gis will feel boxier through the torso and may be looser through the hips. If comfort and fit are a priority, a women’s cut is usually the better choice.

For more options, see our women’s BJJ gi guide.

Children’s BJJ gis use the “M” prefix (for Minor), with sizes running from M00 (the smallest) through to M4 (the largest, closest to the smallest adult sizes). Kids’ gis are primarily sized by height rather than weight, as children’s builds vary enormously at any given age.

Growth considerations: It is tempting to buy a larger size for growing children, but an oversized gi can be dangerous — excess fabric can catch on fingers and toes during training. If your child is between sizes, size up by one size only and expect the gi to shrink slightly in the wash.

Most children transition to adult sizing (A0 or A1) between the ages of 14 and 16, depending on their height. An M4 sits between a kids’ and adult gi, so once your child outgrows an M4, move to an A0 or A1 based on their measurements. For younger athletes, see our complete kids’ BJJ gi guide.

Because there is no universal sizing standard, you should always consult the brand-specific chart for the gi you intend to purchase. Below are size charts from five of the most popular brands available in the UK. For full brand reviews, see our best BJJ gi brands guide.

Understanding whether your gi is pre-shrunk or shrink-to-fit is critical for choosing the correct size.

Pre-shrunk gis have been heat-treated or chemically treated (sanforised) during manufacturing to remove most potential shrinkage. You should order your exact measured size. Expect no more than 1–2% further shrinkage with proper care. Most modern mid-range and premium brands sell pre-shrunk gis, including Tatami, Progress, Hyperfly, Kingz, Scramble, and Fuji.

Shrink-to-fit gis are sold in their full, unshrunk state. You should order one size up from your measured size and then shrink the gi with warm washes to achieve a custom fit. These are less common in the modern market but are still found in some traditional Brazilian brands and budget options. Shrink-to-fit gis can shrink by 5–10% when washed in hot water.

If you are unsure whether your gi is pre-shrunk, check the product description or the brand’s care guide. For detailed instructions on how to manage shrinkage, read our BJJ gi shrinkage guide.

The weave type of your gi also affects shrinkage behaviour. Pearl weave gis (the most common modern weave) show minimal shrinkage, whilst single and gold weave gis can shrink more noticeably. The material composition matters too — 100% cotton gis shrink more than cotton-polyester blends.

If you plan to compete in IBJJF-sanctioned events, your gi must meet specific measurement requirements. Referees will check your gi before matches, and a non-compliant gi means disqualification.

• Sleeves: Must not be more than 5 cm above the wrist bone when arms are extended straight forward
• Sleeve cuff width: Minimum 7 cm opening at the wrist
• Trousers: Must not be more than 5 cm above the ankle bone
• Trouser cuff width: Minimum 7 cm opening at the ankle
• Jacket length: The skirt of the gi jacket must reach past the top of the thighs (below the gluteus)

These rules mean that sleeve and trouser length are the most critical measurements for competitors. If your gi is even slightly too short in the sleeves, it can be ruled illegal. This is particularly important for tall athletes who should consider L-size variants to ensure compliance.

For a full competition preparation checklist, see our competition checklist guide, and for all IBJJF gi rules, read our IBJJF requirements page.

Follow these steps to find the right BJJ gi size:

1. Measure yourself: Take your height, weight, arm length, and chest circumference. Use our step-by-step measurement guide for accurate results.
2. Check the universal chart: Use the height and weight matrix above to identify your base size.
3. Cross-reference with the brand: Check the specific brand chart for the gi you plan to buy. Sizing varies — what is an A2 in Tatami might fit differently to an A2 in Fuji.
4. Account for body type: Tall and lean? Look for L variants. Broad and stocky? Look for H variants. See our guides for tall athletes and short and stocky builds.
5. Factor in shrinkage: If the gi is pre-shrunk, order your exact size. If shrink-to-fit, order one size up. Read our shrinkage guide for more detail.
6. Consider your preference: Prefer a tight competition fit? Size down. Prefer a relaxed training fit? Size up.

Proper washing prevents unwanted shrinkage — see our BJJ gi washing guide for care instructions that protect your investment.