10mm vs 13mm Lifting Belt: Which Thickness Should You Buy?

Once you decide to buy a powerlifting-style belt, the next question appears fast: 10mm or 13mm? Both are about 4 inches wide, both are used by strong lifters, and on paper the difference is just three millimeters. In the hand, though, a 13mm belt feels noticeably stiffer, heavier and slower to mold to your body. This article compares the two thicknesses honestly, explains who tends to prefer each, and shows why 10mm ends up being the practical pick for most people.

What Thickness Actually Changes

Thickness mostly changes stiffness. A thicker belt bends less, so it resists your midsection pushing outward more firmly and holds its shape under very heavy loads. That stiffness is the reason some elite powerlifters like 13mm. It is also the reason a 13mm belt can feel like a board strapped to your waist for the first months, digging into ribs and hips until it softens.

Thickness does not change how much the belt "adds" to your lift in any guaranteed way. The benefit of any belt comes from you breathing in and bracing against it. A belt you can brace into comfortably and consistently will usually serve you better than a stiffer one that you fight every set. For more on what to realistically expect, read how much does a lifting belt add.

The Case for a 10mm Belt

• Shorter break-in: A 10mm belt usually molds to your torso much faster.
• More comfortable in deep positions: It flexes a little more at the bottom of a squat and in a deadlift setup.
• Versatile: Comfortable enough for squats, deadlifts, presses and rows in one session.
• Plenty stiff for most people: Unless you are handling truly elite weights, 10mm offers more firmness than most lifters can use.
• Lighter and easier to put on and take off.

The Bay Gear Co. Lever Lifting Belt is a 10mm belt, 4.25" wide, at $129.99. We chose that thickness because it is the most useful option for the widest range of lifters, from first-time belt buyers to experienced powerlifters.

The Case for a 13mm Belt

• Maximum stiffness: Some very strong lifters feel it holds its shape better under extreme loads.
• Durability perception: More material can feel more substantial, though build quality matters more than raw thickness.
• Preference: Some lifters simply like the feeling of an unyielding belt.

The downsides are real, though. A 13mm belt can take a long time to break in, and some lifters never find it comfortable for conventional deadlifts because it jams into the hips in the start position. It is also harder to fine-tune on a lever setup when you are fighting stiffness.

10mm vs 13mm for Squats

On squats, the extra stiffness of a 13mm belt is most likely to be noticed, because you stay fairly upright and the belt wraps evenly around your midsection. Even so, many top squatters use 10mm belts. If you are a beginner or intermediate, a 10mm belt lets you learn to brace hard without the belt dominating your position.

10mm vs 13mm for Deadlifts

Deadlifts are where 10mm often wins outright. In the start position your torso is folded, and a thick, rigid belt can push into your thighs and ribs, making it hard to get your hips set. Many lifters who own 13mm belts wear them looser for pulls, or skip them. A 10mm belt bends just enough to fit the position. For setup tips, see our guide on how to deadlift properly.

Comfort and Body Type

Short-torso lifters feel a thick belt the most, because there is less space between ribs and hips for a rigid belt to sit. If that describes you, 10mm is usually the better call. Larger lifters with long torsos may tolerate 13mm more easily, but they still need to get through the break-in.

Break-In Time Compared

Expect a 10mm belt to feel noticeably more comfortable after a few weeks of regular use. A 13mm belt can take months. You can speed either up by rolling the belt, working it in your hands and wearing it on lighter sets. Our step-by-step guide on how to break in a lifting belt covers the methods.

Lever vs Prong in Either Thickness

Both thicknesses come in lever and prong versions. A lever closes to the same tightness every time with one motion, which many lifters love for heavy squats. Prong buckles allow more quick adjustment between lifts. Thickness and closure are separate choices; compare closures in lever belt vs buckle belt vs quick-locking belt.

Competition Rules

If you plan to compete, check your federation's rulebook. Many powerlifting federations set a maximum belt thickness of 13mm and a maximum width of about 10cm (roughly 4 inches). Rules vary, so verify with the specific federation. A 10mm belt sits comfortably within common limits. Our powerlifting meet checklist covers other gear to confirm before meet day.

Is a 13mm Belt Worth It for Beginners?

Rarely. Beginners benefit most from learning to brace properly, getting the belt position right and training consistently. A belt that is uncomfortable makes all of that harder. A 10mm belt gives plenty of firmness while you build those habits. If you eventually lift elite weights and want to experiment, you can always add a 13mm belt later.

What Lifters Report After Switching

The most common story we hear goes like this: a lifter buys the thickest belt available because it sounds strongest, spends two months fighting it on deadlifts, and eventually reaches for a thinner belt on pulling days. The reverse also happens, though less often. A powerlifter who has squatted in a 10mm belt for years tries a 13mm and likes how unyielding it feels at the bottom of a heavy single. Neither experience is wrong. They simply show that thickness is a preference layered on top of good bracing, not a shortcut around it.

If you can, try a friend's belt in both thicknesses on a few warm-up sets before buying. Pay attention to three things: whether you can take a full breath, whether you can get into your deadlift start position without the belt jamming into your thighs, and whether the edges dig into your ribs at the bottom of a squat. Those three checks tell you more than any spec sheet.

Care and Longevity

Thicker does not automatically mean longer lasting. How long a belt survives depends on stitching, hardware, how you store it and how often it gets soaked in sweat. Wipe your belt down after sessions, let it air dry instead of leaving it balled up in a gym bag, and store it flat or loosely rolled. Check the stitching and lever screws every few months. A well-cared-for 10mm belt can last many years of heavy training.

Price and Value

13mm belts often cost more because they use more material and are aimed at competitive lifters. For most people, the extra money buys stiffness they will not use and a break-in they will not enjoy. Spending that difference on a pair of knee sleeves or lifting straps usually improves training more.

How to Decide: A Simple Checklist

Choose 10mm if:

• You want one belt for squats, deadlifts and presses.
• You are new to belts or still refining your brace.
• You have a short torso.
• You deadlift conventional and dislike things digging into your hips.
• You want a belt that feels good in weeks rather than months.

Consider 13mm if:

• You are an experienced powerlifter handling very heavy weights.
• You already own a 10mm and want maximum stiffness for squats.
• You are comfortable with a long break-in.

Other Belt Options Worth Considering

Not every lifter needs a thick powerlifting belt. If you train a mix of strength and conditioning, a belt that adjusts quickly may suit your sessions better. Our Quick Locking Weightlifting Belt is $34.99 and adjusts in seconds, a good fit for circuits, Olympic lifting days and carries. Compare styles in powerlifting belt vs weightlifting belt and browse the quick locking belts collection.

Getting the Most From Any Belt

Whatever thickness you choose, the same habits make it useful:

1. Size it correctly using our lifting belt size guide.
2. Wear it at the right height for each lift.
3. Tighten it so you can just fit two fingers under it relaxed.
4. Take a big belly breath and brace into it before each rep.
5. Unclip between sets.

Pair Your Belt With the Right Gear

Heavy squat and deadlift days often call for more than a belt. Knee sleeves (9.5" long, 7mm, $59.99) are a common partner for squats, and lifting straps help on high-rep pulls. Check our deals and bundles for combinations that include the lever belt.

The Verdict

In the 10mm vs 13mm lifting belt debate, 13mm offers maximum stiffness for a small group of very strong lifters willing to put up with a long break-in. For almost everyone else, 10mm gives plenty of firmness, faster comfort and more versatility across lifts. That is why our lever belts collection is built around a 10mm belt.

Every Bay Gear Co. order includes free shipping on orders over $49 and a 30-day return policy, so you can try the belt on your own squats and pulls.