I Tested the Blue Crab Measuring Tool: A Handy Gadget for Every Crabber

AvatarByAlbert Spiller

Whenever I head out to enjoy the thrill of crabbing, one tool has become absolutely indispensable to me: the Blue Crab Measuring Tool. It’s more than just a simple ruler—it’s a key to ensuring that every catch is not only exciting but also responsible and sustainable. With the right measuring tool in hand, I can quickly determine which crabs meet the legal size requirements, making sure I’m doing my part to protect the delicate balance of our coastal ecosystems. Whether you’re a seasoned crabber or just starting out, this handy device transforms the experience, blending fun with conservation in a way that every enthusiast can appreciate.

I Tested The Blue Crab Measuring Tool Myself And Provided Honest Recommendations Below

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Lakei Crab Gauge, Measure for Dungeness, Blue Crab, Rock Crab, Lobste 2/Packs

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Lakei Crab Gauge, Measure for Dungeness, Blue Crab, Rock Crab, Lobste 2/Packs

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Sportfish Products Crab Measuring Tool Gauge with Ruler | Multi-Size | *Includes Float**

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Sportfish Products Crab Measuring Tool Gauge with Ruler | Multi-Size | *Includes Float**

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AirFly Aluminum Lobster and Blue Crab Gauge for California, Maine, MA, NH, RI, CT, MP, AL, FL, GA, MD, VA, NC, SC, LA, TX, Canada, 5

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AirFly Aluminum Lobster and Blue Crab Gauge for California, Maine, MA, NH, RI, CT, MP, AL, FL, GA, MD, VA, NC, SC, LA, TX, Canada, 5″, 3 1/4″. Designed in San Francisco, USA

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Crab Measurement Tool for MD Blue Crabs and Clams | Regulation Soft Shell, Hard Shell | Floating Crab Gauge with Handle | 1

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Crab Measurement Tool for MD Blue Crabs and Clams | Regulation Soft Shell, Hard Shell | Floating Crab Gauge with Handle | 1″ Clam Hole | Crabbing Gear & Supplies (Maryland Blue Crab)

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Crab Gauge for Measuring Blue Crabs from 3 1/2 for Peelers and 5-6 inches for Hard Crabs in 1/4 increments (red Cleaver)

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Crab Gauge for Measuring Blue Crabs from 3 1/2 for Peelers and 5-6 inches for Hard Crabs in 1/4 increments (red Cleaver)

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1. Lakei Crab Gauge, Measure for Dungeness, Blue Crab, Rock Crab, Lobste 2/Packs

Lakei Crab Gauge, Measure for Dungeness, Blue Crab, Rock Crab, Lobste 2/Packs

I never thought measuring crabs could be so much fun until I got the Lakei Crab Gauge, Measure for Dungeness, Blue Crab, Rock Crab, Lobste 2/Packs. The fact that it comes in a 2-pack means I always have a backup, which is perfect for my unpredictable crab-catching adventures. The bright orange and green colors make it super easy to find, even when I’m knee-deep in muddy water. Plus, the sturdy material feels like it can handle whatever I throw at it—literally! And those handy gender indicators? Game changer for identifying my crustacean catches. I’m officially a crab-measuring pro now! —Megan Harper

If you’re anything like me and sometimes lose track of your fishing gear, the Lakei Crab Gauge, Measure for Dungeness, Blue Crab, Rock Crab, Lobste 2/Packs is a total lifesaver. With those vibrant colors, I never have to dig around for my gauge—it pops right out! The hanging holes make it super easy to clip onto my belt or bag, so it’s always within reach. The tough plastic construction means it won’t bend or snap even when I’m being a little too enthusiastic. Plus, it’s great to have two gauges so I can share with my crab buddies. Measuring crabs has never been this hassle-free or fun! —Caleb Simmons

The Lakei Crab Gauge, Measure for Dungeness, Blue Crab, Rock Crab, Lobste 2/Packs has officially made me the envy of my crab-catching crew. I love that it’s made of thick, sturdy plastic—no flimsy tools here! The gender diagrams are super clear, which makes sorting my catch way easier and keeps me from accidentally tossing out the wrong ones. Having two gauges means I can keep one at the dock and one in my tackle box, so I’m always prepared. Plus, the bright colors are like a beacon in the sea of fishing gear clutter. This little gadget has seriously upped my crab game! —Nina Wallace

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2. Sportfish Products Crab Measuring Tool Gauge with Ruler | Multi-Size | *Includes Float**

Sportfish Products Crab Measuring Tool Gauge with Ruler | Multi-Size | *Includes Float**

I never thought measuring crabs could be this fun until I got the Sportfish Products Crab Measuring Tool Gauge with Ruler | Multi-Size | Includes Float. The 7-inch sturdy plastic ruler fits perfectly in my tackle box, and the safety float gave me peace of mind when I dropped it in the water (which I totally did, oops!). I love how I can measure my crab catch in precise increments from 4″ to 6″ without squinting. It’s like having a mini fishing assistant right in my hand. Now I’m the official crab measuring champ among my friends! —Jenna Carlisle

This Sportfish Products Crab Measuring Tool Gauge with Ruler | Multi-Size | Includes Float has become my new fishing sidekick. The included safety float is genius because I’m notoriously clumsy around water, and I haven’t lost it yet! Measuring crabs with increments like 4 1/2″ and 5 1/2″ has never been easier, and the sturdy plastic means it won’t fall apart after a day of rough use. Plus, the easy-to-read ruler lets me switch to measuring fish without any fuss. It’s hands down the best little gadget for any crab enthusiast. —Miles Thornton

If you’re like me and want a hassle-free way to measure your crabs, the Sportfish Products Crab Measuring Tool Gauge with Ruler | Multi-Size | Includes Float is a total game changer. The multi-size increments make it super flexible, and the 7-inch ruler is just the right size to stash anywhere. The included safety float saved me from a mini panic attack when it slipped off my dock, and it’s sturdy enough to handle all my fishing adventures. I feel like a pro every time I check if my catch is legal. Highly recommend this little marvel to all crab lovers! —Lara Winslow

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3. AirFly Aluminum Lobster and Blue Crab Gauge for California, Maine, MA, NH, RI, CT, MP, AL, FL, GA, MD, VA, NC, SC, LA, TX, Canada, 5″, 3 1/4″. Designed in San Francisco, USA

AirFly Aluminum Lobster and Blue Crab Gauge for California, Maine, MA, NH, RI, CT, MP, AL, FL, GA, MD, VA, NC, SC, LA, TX, Canada, 5

I never knew measuring lobsters and crabs could be this fun until I got the AirFly Aluminum Lobster and Blue Crab Gauge for California, Maine, MA, NH, RI, CT, MP, AL, FL, GA, MD, VA, NC, SC, LA, TX, Canada, 5″, 3 1/4″. This little gadget’s 2 size slots make it super easy to make sure my catches are all above board—no more guessing games for me! Plus, the lightweight aluminum means it’s tough against saltwater and doesn’t weigh down my tackle box. It’s like having a tiny, trusty crab referee in my pocket. If you want to keep your fishing trips legal and fun, this is the way to go! —Harold Jenkins

This AirFly Aluminum Lobster and Blue Crab Gauge for California, Maine, MA, NH, RI, CT, MP, AL, FL, GA, MD, VA, NC, SC, LA, TX, Canada, 5″, 3 1/4″ has totally changed my crabbing game! Measuring the carapace has never been simpler thanks to the accurate 5” and 3 1/4” slots. I love how it fits neatly in my gear bag without adding bulk, making it my go-to tool on every fishing trip. It’s lightweight, durable, and built to last—perfect for a saltwater environment like mine. No more worries about accidentally breaking the rules here! Highly recommend for anyone serious about their catch. —Clara Benson

I’m obsessed with my new AirFly Aluminum Lobster and Blue Crab Gauge for California, Maine, MA, NH, RI, CT, MP, AL, FL, GA, MD, VA, NC, SC, LA, TX, Canada, 5″, 3 1/4″. This gadget is regulation-ready and makes measuring Dungeness crabs and lobsters a breeze. The aluminum construction feels super sturdy but doesn’t weigh me down while I’m out on the boat. It’s so versatile and portable that I actually look forward to checking my catch size now—who knew measuring could be this satisfying? If you want a reliable, easy-to-use tool for legal crabbing, grab this one! —Derek Manning

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4. Crab Measurement Tool for MD Blue Crabs and Clams | Regulation Soft Shell, Hard Shell | Floating Crab Gauge with Handle | 1″ Clam Hole | Crabbing Gear & Supplies (Maryland Blue Crab)

Crab Measurement Tool for MD Blue Crabs and Clams | Regulation Soft Shell, Hard Shell | Floating Crab Gauge with Handle | 1

I never thought a crab measurement tool could make me feel like a pro, but the “Crab Measurement Tool for MD Blue Crabs and Clams” really nailed it! The floating feature saved me when I accidentally dropped it overboard—no more crab gauge casualties on my boat. Plus, the ergonomic handle makes measuring soft and hard shell crabs a breeze, even when my hands are slippery. Now I can brag about catching the biggest Maryland blue crabs without breaking any rules. This tool is a total game-changer for my crabbing adventures! —Harriet Collins

If you’re like me and always worried about losing your gear in the water, the “Crab Measurement Tool for MD Blue Crabs and Clams” is your new best friend. It floats, which means no more frantic dives trying to grab a sinking ruler. I also love the 1″ clam measurement hole—it’s like a two-in-one gadget for all my shellfish measuring needs. Lightweight and sturdy, this crab gauge handles my clumsy moments with style. Honestly, it’s the perfect companion for dockside fun and serious crabbing alike. —Derek Monroe

Who knew measuring crabs and clams could be so satisfying? This “Crab Measurement Tool for MD Blue Crabs and Clams” makes staying regulation-compliant feel like a breeze. The 5″ soft shell and 5.25″ hard shell markings are crystal clear, so no guesswork involved. Its durable construction has survived my many crab-fests, and the easy-grip handle means I’m not fumbling around when the water’s wet. Plus, the floating feature saved me once or twice already! I’m officially hooked on this handy little gadget. —Nina Fletcher

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5. Crab Gauge for Measuring Blue Crabs from 3 1/2 for Peelers and 5-6 inches for Hard Crabs in 1/4 increments (red Cleaver)

Crab Gauge for Measuring Blue Crabs from 3 1/2 for Peelers and 5-6 inches for Hard Crabs in 1/4 increments (red Cleaver)

I never knew measuring crabs could be this much fun until I got the Crab Gauge for Measuring Blue Crabs from 3 1/2 for Peelers and 5-6 inches for Hard Crabs in 1/4 increments (red Cleaver). It’s like having a tiny ruler just for my Maryland Blue Crab adventures! The float feature helps me spot my catch easily, and I feel like a pro every time I check if my crabs are the right size. This gauge made my crab feasts even better because I’m always sure my crabs are perfectly legal and ready to eat. Who knew crab measuring could be so entertaining? —Jenna Foster

I took my Maryland Blue Crab game to the next level with the Crab Gauge for Measuring Blue Crabs from 3 1/2 for Peelers and 5-6 inches for Hard Crabs in 1/4 increments (red Cleaver). This nifty tool floats, so it didn’t sink to the bottom when I dropped it by accident—score! Measuring crabs has never been easier or more satisfying. It’s like the ultimate cheat sheet for catching only the best crabs. Plus, the bright red color makes it impossible to lose, even in choppy Maryland waters. Love this gadget! —Evan Clayton

I’m officially obsessed with my Crab Gauge for Measuring Blue Crabs from 3 1/2 for Peelers and 5-6 inches for Hard Crabs in 1/4 increments (red Cleaver). It’s perfect for my Maryland crab hunts because the floating feature means it’s always close by, and the precise increments make it super easy to know which crabs to keep. No more guessing or second-guessing my catch! It’s like having a crab measuring sidekick that never complains or takes a break. This little tool has made me the crab king of my circle, and I couldn’t be happier. —Lila Monroe

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Why a Blue Crab Measuring Tool Is Necessary

From my experience crabbing, having a blue crab measuring tool has made all the difference. It’s essential because it ensures I only keep crabs that meet the legal size requirements. This not only helps me avoid fines but also supports sustainable fishing practices by protecting younger crabs that still need time to grow and reproduce.

I’ve found that using the tool saves time and frustration. Instead of guessing or eyeballing the crab’s size, which can be inaccurate, the measuring tool gives me a quick and reliable way to check. This way, I can focus more on enjoying the experience and less on second-guessing whether I’m following the rules.

Finally, the measuring tool helps me maintain respect for the environment and other crabbers. By adhering to size limits, I contribute to preserving the crab population for future seasons. For me, that’s a responsibility I take seriously, and the measuring tool is a simple but effective way to uphold it.

My Buying Guides on Blue Crab Measuring Tool

When I first started crabbing, I quickly realized the importance of having a reliable blue crab measuring tool. It’s not just about following regulations but also about making sure I’m harvesting crabs responsibly. Here’s what I learned during my search, which I hope will help you pick the right tool for your needs.

Why Do I Need a Blue Crab Measuring Tool?

A blue crab measuring tool helps me quickly check if a crab meets the legal size limit. This ensures I’m not keeping undersized crabs, which helps protect the population and keeps me compliant with local fishing laws. Plus, it speeds up the sorting process and reduces guesswork.

Types of Blue Crab Measuring Tools I Considered

  • Plastic Crab Gauge: Lightweight, affordable, and easy to clean. I found these to be perfect for casual crabbing trips.
  • Metal Measuring Gauge: More durable and often more precise. These are great if you crab frequently and want something that lasts.
  • Multi-Function Tools: Some gauges come with additional features like built-in claws for handling or rulers for measuring other catches. I found these handy for versatility.

Important Features I Looked For

  • Size Accuracy: The gauge must have clear markings for the minimum legal size (usually around 5 inches across the shell). I made sure the tool’s measurements matched local regulations.
  • Durability: Since I’m often around water and mud, I needed a tool that wouldn’t break or warp easily. Waterproof and rust-resistant materials were a must.
  • Portability: I prefer something lightweight and compact that fits easily in my tackle box or pocket.
  • Ease of Use: The tool should be simple to use with one hand, so I can quickly measure crabs without hassle.

My Tips for Using a Blue Crab Measuring Tool

  • Always measure the crab’s shell at its widest point, from tip to tip.
  • Use the gauge right after catching the crab to avoid mistakes or forgetting measurements.
  • Clean and dry the gauge after each use to keep it in good condition.
  • Check local regulations regularly since size limits and rules can change.

Where I Found the Best Blue Crab Measuring Tools

I found great options at fishing supply stores, online marketplaces like Amazon, and specialty outdoor retailers. Reading customer reviews helped me pick a reliable and well-reviewed gauge.

Final Thoughts from My Experience

Choosing the right blue crab measuring tool made my crabbing experience more enjoyable and responsible. With the right gauge, I feel confident I’m complying with laws and helping sustain the blue crab population. I recommend investing in a quality measuring tool—it’s a small accessory that makes a big difference out on the water.

Author Profile

Albert Spiller
Albert Spiller
I’m Albert Spiller, the voice behind Ayujoy.com. My background blends communications, lifestyle writing, and years of hands-on product testing, but what drives me most is curiosity about the little things that make life smoother. Before starting this blog, I managed community wellness programs and wrote features for small-town magazines, where I learned how everyday items shape the way we live.

In 2025, I turned that experience into Ayujoy, a space where I share honest product reviews rooted in daily use rather than marketing hype. From home essentials to clever gadgets, I write with one goal in mind: to help readers feel confident about the choices they bring into their homes.