FGSS Men's 5mm Front Zip Wetsuit
If you're asking, "What wetsuit size do I need?", start with your actual body measurements—not your T-shirt size and not just your height and weight.
Wetsuit sizing varies between manufacturers, and two divers with the same height and weight can need very different suits because of differences in chest, waist, hips, thighs, shoulders and torso length.
The right wetsuit should fit closely enough to limit unnecessary water movement while still allowing you to breathe normally, move comfortably and operate your dive equipment. The number of Xs on the tag matters far less than how the suit fits your actual body.
What Measurements Do I Need for a Wetsuit?
Before comparing size charts, take fresh measurements with a soft measuring tape. Don't rely on measurements from several years ago or the size of clothing currently hanging in your closet.
Depending on the manufacturer's chart, useful measurements can include:
- Height — stand naturally without shoes.
- Weight — useful as one reference point, but not enough by itself.
- Chest — measure around the fullest part of your chest while breathing normally.
- Waist — measure around your natural waist without pulling the tape tight.
- Hips — measure around the fullest part of your hips and seat.
- Inseam — useful for evaluating leg length in full suits.
- Torso proportions — especially important if suits tend to pull at your shoulders or crotch.
Use the measurements requested by the specific manufacturer. Not every brand builds its size chart around exactly the same dimensions.
Shopping for an FGSS wetsuit? We've created a dedicated sizing chart for the FGSS Men's 5mm Front Zip Wetsuit. Compare your measurements with the FGSS size chart on the product page to help determine which size is the best starting point for your body.
Don't Use Your Regular Clothing Size
A diver who normally wears XXL clothing should not automatically order an XXL wetsuit.
Wetsuits are technical exposure garments, and sizing isn't standardized across the industry. An XXL from one manufacturer can fit very differently from another manufacturer's XXL because the patterns, proportions, materials and intended fit can differ.
That's why we recommend using the size chart for the specific wetsuit you're considering.
For more about inconsistent scuba sizing, read Why XXL Isn't Really XXL.
What If My Measurements Fall Into Different Wetsuit Sizes?
This is where wetsuit shopping gets frustrating for many larger and non-standard-size divers.
Your chest may indicate one size while your waist or hips indicate another. You might have a longer torso, broader shoulders, larger thighs or calves, or proportions that simply don't line up neatly with a manufacturer's pattern.
Don't assume that means something is wrong with your body. It may mean that particular wetsuit's cut isn't the best match.
When your measurements cross several sizes, identify where the fit conflict occurs. A suit that accommodates your waist but severely restricts your shoulders isn't a successful fit. Neither is one that fits your chest but leaves substantial loose material elsewhere.
Instead of automatically sizing up or down, compare another cut or manufacturer when possible. Sometimes a different wetsuit pattern solves the problem better than a different size.
How Tight Should a Wetsuit Be?
A scuba wetsuit should generally fit close to the body without causing pain or unnecessarily restricting normal breathing and movement.
You don't want large gaps where water can move freely through the suit, but you also shouldn't accept severe restriction simply because someone told you wetsuits are "supposed to be tight."
Once the wetsuit is positioned correctly, check your breathing and movement. Raise your arms, bend your knees, reach across your body and simulate reaching the equipment you need during a dive.
Pay particular attention to the:
- neck
- shoulders and underarms
- chest
- waist and lower back
- hips and crotch
- thighs
- knees
- calves
The goal is an even, functional fit rather than extreme tightness in one area and excessive looseness somewhere else.
How Do I Know If My Wetsuit Is Too Small?
Some resistance while putting on a wetsuit is normal. That alone doesn't mean you need a larger size.
Once the suit is fully pulled into position, however, warning signs of an excessively small or poorly proportioned suit can include:
- Painful pressure or pinching.
- Difficulty taking a normal full breath.
- Severely restricted shoulder, arm or leg movement.
- Numbness or tingling.
- A zipper that cannot be closed without excessive force.
- The suit pulling strongly downward at the shoulders because the torso is too short.
- Difficulty positioning the crotch and underarm areas correctly.
Remember that too small and wrong shape aren't always the same thing. Going up one size may create loose areas without solving the original proportion problem.
How Do I Know If My Wetsuit Is Too Big?
A wetsuit can also be too loose to perform as intended.
Look for substantial gaps, excessive folds or loose areas around the lower back, underarms, neck, crotch or behind the knees. Excess material may also bunch as you move.
A small wrinkle doesn't automatically make a wetsuit too large. Bodies aren't shaped like mannequins, and perfect visual smoothness isn't the objective.
The more important question is whether the suit maintains reasonably close contact with the body without excessive areas where water can circulate.
Why Does My Wetsuit Bunch Behind My Knees?
Bunching behind the knees can have several causes. The legs may be too long, the suit may be too large through part of the lower body, the proportions may not match your legs, or the suit simply may not have been pulled fully into position before the upper body was put on.
Before deciding you need a different size, work the neoprene gradually upward from the ankles and make sure the knees and crotch are positioned correctly.
If significant bunching remains after the suit is properly positioned, compare the suit's leg length and proportions with another size or cut.
Why Does Wetsuit Thickness Affect Fit?
A 3 mm and a 7 mm wetsuit carrying the same size label may not feel identical.
Material thickness, neoprene formulation, panel construction and stretch characteristics all influence how a suit feels. Thicker exposure protection may feel more substantial and can make mobility differences more noticeable.
That doesn't mean you should automatically size up whenever you buy a thicker wetsuit. Use the manufacturer's chart for that specific suit and evaluate the actual fit.
If you're deciding between different types of exposure protection, browse our big and tall wetsuits and drysuits.
Does Wetsuit Stretch Matter?
Yes. Two wetsuits with similar measurements can feel quite different because of material and construction.
Stretchier materials and strategically placed flexible panels may improve mobility or make donning easier for some divers. Other suits may feel more structured.
That is one reason simply comparing size labels isn't enough. The specific suit design matters.
Full Wetsuit vs. Shorty Sizing
A full wetsuit interacts with more of your body, so torso, arm and leg proportions become particularly important.
A shorty has less material through the arms and legs, but chest, waist, hip and torso fit still matter. Don't assume that a shorty can be significantly oversized simply because it provides less coverage.
If you're deciding between the two styles, see our Shorty vs. Full Wetsuit guide.
What About Big and Tall or Plus Size Wetsuits?
Extended sizing is useful, but the words "big and tall" or "plus size" don't guarantee that a particular suit will match every larger diver.
One diver may need additional chest and shoulder room. Another may need more room through the waist, hips or thighs. Someone else may need additional torso or leg length.
This is why FGSS focuses on actual measurements and proportions rather than assuming every larger diver needs the same shape.
Explore our extended-size wetsuit and drysuit selection or our broader collection of scuba gear for larger divers.
Is My Wetsuit Too Small, or Is It Just Hard to Put On?
This is an important distinction.
Neoprene can create friction against skin, particularly around the feet and lower legs. A wetsuit that fits properly once it is completely positioned may still require some effort to put on.
Before assuming you need a larger size, make sure you're gradually working the material upward instead of trying to pull the entire suit from the top.
ScubaSox were developed by FGSS to reduce friction and help feet slide more easily into wetsuits, dive boots and other dive gear. They're particularly useful when the donning process is the problem rather than the actual wetsuit size.
Should I Size Up If I'm Between Wetsuit Sizes?
Not automatically.
There isn't a universal rule that every between-size diver should go larger or smaller. Look at which measurements are creating the conflict and how the specific suit needs to function.
If one size creates severe restriction while the next leaves significant gaps, the best answer may be a different wetsuit cut rather than either of those sizes.
That's also where speaking with someone familiar with the product can be much more useful than simply choosing the closest number on a chart.
How to Choose Your Wetsuit Size Online
When buying a wetsuit online, use this process:
- Take fresh body measurements.
- Use the manufacturer's chart for the exact wetsuit you're considering.
- Identify measurements that fall into different sizes.
- Consider your body proportions, not just height and weight.
- Consider the suit's thickness, stretch and construction.
- Evaluate whether another cut may fit better if your measurements cross several sizes.
- Ask questions before purchasing when the chart doesn't provide a clear answer.
For sizing beyond exposure protection, our Scuba Gear Sizing Guide covers BCDs, masks, boots, fins and other wearable dive equipment.
Find a Wetsuit That Fits Your Body
The answer to "What wetsuit size do I need?" isn't simply small, medium, XL or 5XL.
The right size is the one that matches your measurements and proportions closely enough to provide the intended exposure protection while allowing appropriate breathing and movement.
If conventional wetsuit sizing hasn't worked for you, don't assume your body is the problem. Compare measurements, cuts and manufacturers until you find equipment that works with you.
Ready to compare your measurements with an FGSS wetsuit built specifically for larger divers? Visit the FGSS Men's 5mm Front Zip Wetsuit to see the FGSS sizing chart and available sizes.
You can also browse our complete big and tall wetsuit and drysuit collection, or contact Fat Guy Scuba Supply with your measurements and the suit you're considering. Helping divers solve difficult fit questions is exactly what we're here to do.
Don't fit yourself to the wetsuit. Find the wetsuit that fits you.