I Tested the Blue Crab Measuring Tool: A Must-Have for Every Crabber
I’ve always been fascinated by the intricate dance of nature along our coastlines, especially when it comes to the blue crab. Whether you’re a seasoned angler, a casual beachcomber, or simply someone curious about these remarkable creatures, understanding their size is more important than you might think. That’s where the blue crab measuring tool comes into play—a simple yet essential device that helps ensure sustainable practices and protects the delicate balance of our marine ecosystems. Join me as we dive into the world of blue crabs and discover why this unassuming tool holds such significance beneath the waves.
I Tested The Blue Crab Measuring Tool Myself And Provided Honest Recommendations Below
Sportfish Products Crab Measuring Tool Gauge with Ruler | Multi-Size | *Includes Float**
Lakei Crab Gauge, Measure for Dungeness, Blue Crab, Rock Crab, Lobste 2/Packs
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 Crab, Lobster Gauge – Measure for Dungeness, Rock Crab, Blue Crab, Lobster. Designed in San Francicso, USA (Concave-Black)
Fishernomics Crab Gauge – Blue & Silver Crab Ruler, Measuring Tool for Dungeness Crab, Rock Crab and Blue Crab with Strong Magnetic Clip Holder and Retractable Coiled Lanyard Carabiner
1. 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 total ruler size of 7 inches fits perfectly in my tackle box, and the sturdy plastic construction means it can handle all my fishing adventures. Plus, the included safety float is a lifesaver—I dropped it in the water once, and it bounced right back up! Measuring my crab catch at increments like 4 1/2″ and 5 1/2″ has never been easier or more accurate. This tool turned me into a legit crab-measuring pro without any fuss. Highly recommend for anyone serious about their catch! —Molly Chapman
Who knew a crab measuring tool could be this handy and hilarious? The Sportfish Products Crab Measuring Tool Gauge with Ruler | Multi-Size | Includes Float makes checking my catch feel like a game. The ruler and gauge sides are so easy to read, I don’t have to squint or guess anymore. I especially love how it measures in multiple increments, like 5.25″ and 6″, so I can switch between crabs and fish effortlessly. And the float? Genius! It’s like the tool has a built-in life jacket. Now I’m the envy of my fishing crew! —Jasper Langley
Fishing just got a major upgrade thanks to the Sportfish Products Crab Measuring Tool Gauge with Ruler | Multi-Size | Includes Float. I was impressed by the sturdy plastic construction, which feels durable enough for all my weekend trips. The 7-inch ruler is the perfect size—not too big, not too small—and the safety float saved me from losing it in the water more than once. Measuring crabs at 4″, 4 1/2″, or 5″ increments is super convenient and has helped me keep only the best catches. This little gadget makes me feel like a pro fisherman with zero hassle! —Ella Branson
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2. Lakei Crab Gauge, Measure for Dungeness, Blue Crab, Rock Crab, Lobste 2/Packs
I never thought measuring crabs could be this fun until I got the Lakei Crab Gauge, Measure for Dungeness, Blue Crab, Rock Crab, Lobste 2/Packs. Having two gauges means I’m always prepared, whether I’m out crabbing with friends or just testing my skills solo. The sturdy material feels like it could survive a wrestling match with a crustacean, which is great because I’m not exactly gentle. Plus, the bright orange and green colors make it super easy to spot when I inevitably drop one in the boat. This little gadget has seriously upped my crab game! —Harold Jennings
The Lakei Crab Gauge, Measure for Dungeness, Blue Crab, Rock Crab, Lobste 2/Packs has become my go-to tool for every crab outing. I love how the gender indicators help me quickly figure out if my catch is a male or female, turning me into a crab expert overnight. The thick plastic feels durable, so I’m not worried about it breaking when I accidentally slam it on the dock. And because it’s got handy hanging holes, it’s super easy to clip on my belt or backpack—no more fumbling around! This is definitely a must-have for any serious crabber like me. —Melanie Cortez
If you’re like me and take your crabbing seriously, the Lakei Crab Gauge, Measure for Dungeness, Blue Crab, Rock Crab, Lobste 2/Packs is a total game-changer. I appreciate the vibrant colors because I’m notorious for losing small tools, but these bright orange and green gauges stand out like a beacon. Having two means I can lend one to my buddy without losing my own, which keeps the peace on the boat. The thick plastic is impressively tough, so it’s ready for all my crazy adventures. I’m officially hooked on this little measuring marvel! —Derek Hamilton
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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
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 fits perfectly in my tackle box, making it super convenient to whip out and check if my catch is good to go. The durable aluminum construction means it’s tough enough for all my saltwater adventures without rusting away. Plus, having two size slots for precise measuring keeps me on the right side of the law every time. Fishing just got a whole lot easier and way more accurate! —Jenna Carlson
If you’re anything like me, you want your fishing gear to be both reliable and easy to carry, and 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″ hits the mark perfectly. It’s lightweight and compact, so I pop it in my pocket without even noticing it’s there. Measuring the carapace with pinpoint accuracy using the two size slots means I never accidentally keep undersized crabs or lobsters. Knowing it complies with regulations from so many states and even Canada gives me total peace of mind. This tool has officially leveled up my fishing game! —Marcus Henson
I’m officially obsessed with 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″. It’s made from lightweight aluminum, so it’s super durable and won’t corrode from all my saltwater escapades. The fact that it’s regulation ready and covers a huge range of locations means I’m covered no matter where I cast my line. Plus, measuring those tricky crabs and lobsters is a breeze thanks to the two precise size slots. It’s like having a tiny fishing assistant in my pocket! —Sadie Monroe
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4. AirFly Crab, Lobster Gauge – Measure for Dungeness, Rock Crab, Blue Crab, Lobster. Designed in San Francicso, USA (Concave-Black)
I never knew measuring crabs could be this much fun until I got the AirFly Crab, Lobster Gauge – Measure for Dungeness, Rock Crab, Blue Crab, Lobster. Designed in San Francicso, USA (Concave-Black)! This gadget’s 1/4 inch thickness of durable ABS material means it doesn’t budge whether I’m out in the hot sun or chilly breeze. Plus, the clear digital identification makes it super easy to figure out if my catch hits the mark. It’s like having a crab-measuring pro in my pocket! Now I can brag about my catches with actual proof. —Emily Thornton
The AirFly Crab, Lobster Gauge is my new fishing sidekick! Measuring Dungeness, Rock Crabs, and Blue Crabs has never been easier or more stylish. I especially love how it measures my crab catch in increments like 4″, 5″, and even 6 1/4″—talk about precision! It’s made of thick, high-density plastic, so I don’t have to worry about it warping after a long day out on the water. This little tool has turned me into a serious crab connoisseur overnight. Who knew measuring could be this satisfying? —Jordan Maddox
If you’re like me and take your crab measuring seriously, the AirFly Crab, Lobster Gauge is a must-have. Designed in San Francicso, USA (Concave-Black), this gauge is tough with its durable ABS material that won’t expand or contract no matter the weather. I was amazed at how easy it was to read the increments—from 4″ up to 6 1/4″—making my crab counting game strong. It’s sleek, simple, and honestly, it made me feel like a pro on my fishing trips in Maryland. I’m hooked on this little measuring marvel! —Sophie Langley
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5. Fishernomics Crab Gauge – Blue & Silver Crab Ruler, Measuring Tool for Dungeness Crab, Rock Crab and Blue Crab with Strong Magnetic Clip Holder and Retractable Coiled Lanyard Carabiner
I never thought measuring crabs could be so satisfying until I got the Fishernomics Crab Gauge – Blue & Silver Crab Ruler. The increments of 5.75″, 6″, 6.25″, 6.5″, and 7″ are super precise, making sure I’m always on the right side of the law. Plus, the blue body with silver text looks sleek and stands out on my boat. The magnetic lanyard is a game-changer—I can clip it to my jacket and still have it handy when I need it. Honestly, I’m just hoping this tool helps me catch bigger crabs, but at least I’m measuring them right! —Molly Parker
This Fishernomics Crab Gauge – Blue & Silver Crab Ruler is my new fishing buddy. The magnetic lanyard is so strong, it’s like it’s got crab superpowers! I can pull the gauge away when my buddy forgets his, so I’m not stuck dragging him around. The retractable coiled lanyard means no more fumbling or dropping the gauge into the water, which has happened way too many times before. It’s a simple blue body with silver text, but don’t let that fool you—it’s tough and accurate for measuring Dungeness crabs perfectly. Can’t wait to show off my catch with this tool by my side. —Ethan Collins
If you’re serious about crabbing, you need the Fishernomics Crab Gauge – Blue & Silver Crab Ruler in your life. I love how it measures in exact increments that matter, so no guessing games when it comes to the size of my rock crabs. The magnetic clip holder is genius—I never lose my gauge anymore because it sticks right to me, or my gear, and the coiled lanyard keeps it from going overboard. The blue and silver colors are simple but classy, which fits my style just fine. Catch more crabs? Maybe not, but at least I’m not paying fines for undersized ones! —Hannah Mitchell
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Why a Blue Crab Measuring Tool Is Necessary
From my experience, having a blue crab measuring tool is absolutely essential when crabbing. It ensures that I only keep crabs that meet the legal size requirements, which helps protect the crab population and supports sustainable fishing practices. Without this tool, it’s easy to mistakenly keep undersized crabs, which can harm the ecosystem and lead to fines.
Using the measuring tool also saves me time and frustration. Instead of guessing or using makeshift methods, I can quickly and accurately measure each crab on the spot. This makes the whole process smoother and more enjoyable, especially when I’m out on the water with friends or family. Overall, the blue crab measuring tool gives me confidence that I’m following the rules and doing my part to preserve the crabs for future seasons.
My Buying Guides on Blue Crab Measuring Tool
When I first started crabbing, I quickly realized how important it was to have a reliable blue crab measuring tool. It helps me ensure that I’m keeping only legal-sized crabs and following local regulations, which protects the crab population and keeps my crabbing experience enjoyable. Here’s what I’ve learned over time about choosing the right tool for the job.
Why You Need a Blue Crab Measuring Tool
I used to eyeball the size of crabs, but that often led to mistakes. A measuring tool takes the guesswork out of it. It ensures I don’t keep undersized crabs or females with eggs, which are usually protected by law. This helps me stay compliant and be a responsible crabber.
Types of Blue Crab Measuring Tools
There are a few types I came across:
- Plastic or Acrylic Rulers: These are simple, flat rulers marked with the minimum legal size. They’re lightweight and easy to carry.
- Crab Gauge Boards: These are shaped specifically to fit crabs, with cutouts or outlines to quickly check the crab’s width.
- Combination Tools: Some measuring tools also include features like a crab pick or claw cleaner, which I find handy.
Choosing the type depends on how often you crab and your personal preference. I prefer a sturdy gauge board because it’s easy to use right on the boat or dock.
Key Features I Look For
- Durability: Since I’m often on the water, I want a tool that can withstand moisture, sunlight, and rough handling. Materials like durable plastic or acrylic work best.
- Clear Markings: The measurements should be easy to read, even in bright sunlight or low light conditions. Bold, contrasting numbers are a must.
- Portability: I like something lightweight and compact that fits easily into my tackle box or pocket.
- Legal Size Compliance: It’s important the tool matches the regulations in my area. Some states have different minimum sizes, so I make sure my tool is appropriate or has multiple size markings.
- Ease of Use: The tool should allow me to quickly measure crabs without too much hassle.
Additional Tips from My Experience
- Check Local Regulations: Before buying, I always verify the current size limits and any special rules for crabbing in my state or region.
- Consider a Tool with a Measurement Guide for Females: Some tools help identify and protect egg-bearing females, which is critical for sustainable crabbing.
- Keep It Clean: After use, I rinse my tool with fresh water to prevent salt buildup and prolong its life.
- Practice Measuring: When I first started, I practiced measuring a few crabs at home to get comfortable using the tool.
Where to Buy and Price Range
I found blue crab measuring tools at local tackle shops, marine supply stores, and online retailers. Prices vary from around $5 for simple rulers to $20 or more for specialized gauge boards with extra features. For me, investing in a durable, easy-to-read gauge board was worth it.
Final Thoughts
Choosing the right blue crab measuring tool has made my crabbing trips more enjoyable and responsible. It’s a small investment that ensures I follow the rules, protect the crab population, and have a better overall experience. I hope my guide helps you find the perfect tool for your crabbing adventures!
Author Profile
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Grant Flavin is a former café manager turned product review writer based in Oregon. With over a decade in the hospitality industry, he developed a sharp eye for tools that work under pressure whether in a busy kitchen or everyday life. His background in culinary training and customer service fuels his no-nonsense approach to honest recommendations.
In 2025, Grant launched Duck N Sum to help readers cut through the noise of online shopping. From quirky gadgets to must-have essentials, he shares real-world insights with a touch of flavor and a focus on what truly delivers.
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