Choosing Scuba Gear Online Without Fit Guesswork

A wetsuit can look perfect in a photograph and still pull across your shoulders. A BCD can match your chest measurement and leave you reaching awkwardly for a strap. That does not mean you are the wrong shape for diving. It means the equipment needs a closer look.

Fat Guy Scuba Supply exists because divers deserve choices that work with their bodies. Whether you are bigger, taller, shorter, broad-chested, or simply tired of inconsistent sizing, shopping online should help you find those choices.

Start with the problem you want your next purchase to solve

Before comparing brands, describe what is uncomfortable about your current gear. Does your wetsuit fit your chest but pull through the torso? Do your boots squeeze the forefoot? Does your BCD ride up even after adjustment? Those details are more useful than deciding you must need the next size up.

Also write down where you dive, the conditions you expect, the exposure protection you wear, and the equipment you already own. A travel setup for warm water and a setup for cooler local diving may need different features. The useful choice is the one that suits your actual dives.

Measure your body, then use the chart for that exact model

Your everyday clothing size is a starting point for conversation, not a reliable wetsuit order. Use a flexible tape and follow the manufacturer's measuring instructions. Ask someone to help when a measurement is difficult to take accurately on your own.

• Wetsuits: Check the measurements the brand requests, which may include height, weight, chest, waist, hips, and inseam. Torso length and room through the thighs and calves can also affect fit.
• BCDs and harnesses: Compare the published ranges and ask about torso length, waist adjustment, shoulder adjustment, and fit over your intended exposure suit.
• Boots and fins: Consider foot length, width, instep height, and the thickness of any socks or boots worn inside the fin pocket.
• Masks: Facial shape and skirt contact matter. A general description such as “large” cannot guarantee a seal.

“XL” in one brand may fit very differently from “XL” in another. Even two models from the same manufacturer can have different patterns or adjustment ranges. Use the current chart for the item you are considering.

Choose a wetsuit cut that gives you room where you need it

A properly fitting wetsuit should sit close to your body while allowing comfortable breathing and the movements you need for diving. Check whether you can reach overhead, bend your knees, and move your shoulders without painful pressure. Large gaps and folds deserve attention too.

If one size fits your chest but leaves the legs too long, buying a still larger size may create new problems. Look for a different cut, short or tall sizing where available, separates, or custom options appropriate to your needs. Our wetsuits and drysuits for larger and hard-to-fit divers provide a place to compare available options.

Do not buy a suit on the assumption that discomfort will disappear once it stretches. If getting dressed is the problem rather than the fit itself, a smooth liner may help. The distinction matters: an accessory can reduce friction, but it cannot give an undersized suit more room.

Buy boots and fins as a compatible combination

Confirm what footwear the fin manufacturer intends you to use. Many open-heel designs work with dive boots, while some travel fins are designed for bare feet or compatible socks. Full-foot pockets have their own sizing requirements.

Try the footwear you intend to dive in before settling on fin size. A thicker boot or neoprene sock can change the space you need. The combination should feel secure without curled toes, pressure across the instep, or excessive heel movement.

Compare our fins for wide feet and larger divers, and bring the complete footwear combination to any fitting. For a low-bulk liner, read when scuba socks help with comfort and gearing up before choosing between Lycra and neoprene.

Look beyond the chest size when choosing a BCD

Your BCD needs to position the cylinder securely, fit your torso, and let you reach its controls and releases. Chest circumference is only one part of that fit.

• Ask how the harness adjusts at the shoulders and waist.
• Check that the size accommodates your exposure protection.
• Consider where straps, buckles, and weight pockets will sit on your body.
• Confirm the lift, weight-pocket capacity, and cylinder compatibility for your intended configuration. A larger size label does not answer those questions.

Jacket, back-inflate, and backplate-and-wing systems offer different layouts. A modular system can provide useful adjustment options, but you still need compatible components and a properly configured harness. Compare BCDs selected for big, tall, and broad-chested divers and ask for help interpreting the sizing before committing.

Choose a mask for your face

Look at the skirt shape, nose pocket, and contact around your cheeks and temples. A mask described as wide-fitting may be a promising candidate, but the fit still needs to be checked on your face.

A gentle check without the strap can help identify an obvious mismatch: place the mask against your face and inhale lightly through your nose. If it holds briefly without uncomfortable pressure, it may be worth trying further. This is a screening step, not a guarantee that the mask will seal during a dive.

Start with our wide-fit scuba masks and follow the individual manufacturer's fitting guidance. Tightening the strap excessively should not be your plan for making an unsuitable mask seal.

Check who sells the item and who handles returns

FGSS offers products sold directly and listings that take you to partner retailers. Check the purchase button before ordering. If it sends you to another retailer, review that retailer's selected model, available options, price, shipping terms, and return policy.

Do not assume a destination retailer has the same returns process as FGSS. Confirm whether dry fitting is allowed, whether tags and packaging must remain intact, who pays return shipping, and whether an item becomes nonreturnable after water use. Resolve those questions before taking new equipment on a trip.

Ask a useful fit question before ordering

“What size should I buy?” is easier to answer when it comes with context. Send your measurements, the exact model, what you will wear with it, and the problem you want to avoid.

For example: “My current suit fits my chest, but it pulls through my shoulders when I reach overhead.” Or: “My boots fit in length, but the fin pocket squeezes the sides of my feet.” You deserve a practical conversation about those details.

For regulators and other equipment with fewer clothing-style sizing concerns, confirm configuration and compatibility too. Compare scuba regulators and regulator systems with your diving environment, service access, and existing equipment in mind.

Common questions about buying scuba gear online

Should I size up if I am between wetsuit sizes?

Not automatically. Compare all required measurements and ask the seller about that model's cut. The better choice may be another pattern or size range rather than a larger version of the same suit.

What should I buy first?

Start with the item causing the biggest fit problem, while accounting for the equipment your training and planned dives require. Confirm footwear before ordering fins that must fit over it, and exposure protection before finalizing BCD fit.

Can a backplate-and-wing system help larger divers?

Its adjustable harness and modular components can be useful when standard BCD proportions do not work well. It still needs an appropriate wing, compatible hardware, and correct fitting. The system's configuration matters as much as its adjustment range.

Can I test new gear in the water and still return it?

That depends on the seller and the item. Read the applicable return policy and obtain any needed clarification before removing tags or getting the equipment wet.

Make the next purchase an informed one

You do not have to settle for equipment that barely fits because it happens to be available. Start with your measurements, make compatibility checks, and give yourself time to ask questions.

Contact FGSS for help comparing fit and gear options. Tell us what has not worked and what you want your next dive to feel like. Comfortable equipment starts with a better fit conversation.

Written by Robert Wesler, founder of Fat Guy Scuba Supply.