Top 10 Best blue crab measuring tool in 2026

Last Updated - 6/15/2026

🏆Best Choice

Lakei

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

9.8

ChoiceComparer.com Score

9.8

/ 10

Outstanding

Main highlights

•2-Pack: Each set includes two crab gauges, ready for any situation.
•Sturdy Material: Crafted from high-quality thick plastic, our crab gauges are robust and stable, ensuring they won't break or deform over time.
•Gender Indicators: Features diagrams for easy identification of male and female crabs.
•Vibrant Colors: Available in orange and green, our crab gauges are bright and easy to spot, reducing the risk of loss.
•Portable Design: Equipped with hanging holes or lanyard slots, making them convenient for carrying, storing, and hanging anywhere.

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$7.99

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AirFly

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

9.7

ChoiceComparer.com Score

9.7

/ 10

Outstanding

Main highlights

•🦀 Accurate Measurements: Features 2 size slots for precise measuring, 5”, and 3 1/4”, ensuring legal compliance for lobster and crab fishing. Measure the carapace, which is the hard shell on its back, from the back of the eye socket to the end of the body shell.
•🦞 Durable Aluminum Construction: Made from lightweight, high-quality aluminum for maximum corrosion resistance and longevity, perfect for saltwater environments.
•🎣 Portable and Convenient: Compact, lightweight design fits easily in your tackle box, pocket, or gear bag for easy access during your fishing trips.
•✅ Regulation Ready: Designed to meet standard size requirements for recreational and commercial crabbing and lobstering in various regions.
•🌊 Versatile Use: Suitable for measuring Dungeness crabs, rock crabs, lobsters, and other crustaceans, making it an essential tool for any fishing enthusiast.
•🦀 Complies with blue hard crab regulations for Maryland, Virginia, Louisiana, North Carolina, South Carolina, Georgia, Florida, Texas, Alabama. 🦞Complies with lobster regulations for California, Maine, Massachusetts, New Hampshire, Rhode Island, Connecticut, and Canada.
•U.S. Patent Pending – This design is legally protected. Imitation discouraged.

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$12.95

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Danielson

Danielson 200CRGA Crab Gauge Anodized Aluminum, Blue, One Size

9.5

ChoiceComparer.com Score

9.5

/ 10

Outstanding

Main highlights

•200CRGA Crab Gauge Anodized Aluminum, Blue, One Size
•200CRGA Crab Gauge Anodized Aluminum, Blue, One Size
•200CRGA Crab Gauge Anodized Aluminum, Blue, One Size
•200CRGA Crab Gauge Anodized Aluminum, Blue, One Size
•200CRGA Crab Gauge Anodized Aluminum, Blue, One Size

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$10.42

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AirFly

AirFly Crab, Lobster Gauge - Measure for Dungeness, Rock Crab, Blue Crab, Lobster. Designed in San Francicso, USA (Concave-Black)

9.4

ChoiceComparer.com Score

9.4

/ 10

Excellent

Main highlights

•Designed for measuring Dungeness, Rock Crabs, Blue Crabs in California, Washington, Oregon, Maryland and Florida
•Measure your crab catch in increments of 4", 5", 5 3/4", 6" and 6 1/4"
•Made with 1/4 inch thickness of durable ABS material that does not expand or contract in heat or cold
•High-Quality: Made of High-density, thick plastic material with clear digital identification and measurement method, make your use process more convenient and simple

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$7.95

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AirFly

AirFly Folding Fish Measuring Board – 32in Ruler with Built-in 3.25”, 5”, 5.75” Gauges – Dungeness, Blue Crab, Lobster – Ruler for Boat, Shore, Kayak – Orange, Designed in USA

9.2

ChoiceComparer.com Score

9.2

/ 10

Excellent

Main highlights

•🎣 Multi-Species Legal Measuring – Ideal for saltwater and freshwater fishing in CA, WA, FL, TX, and more. Perfect for crab, lobster, and fish. All in one compact board.
•🎏 Full 32″ Ruler – High-contrast inch markings ensure accurate fish measurements, even in low light. Great for bass, halibut, flounder, and rockfish.
•🦞 Legal-Size Gauges Built-In – Covers 3.25” lobster, 5” blue crab, and 5.75” Dungeness crab. Perfect for CA, WA, OR, and East Coast regulations.
•🧡 Rugged & Lightweight – Built from marine-grade, high-impact plastic. Withstands saltwater, UV, and field abuse.
•🛶 Compact & Travel-Ready – Bi-fold design fits tackle boxes, deck bins, boat hatches, and kayak storage.
•🇺🇸 Designed in San Francisco – Proudly designed by AirFly for saltwater and freshwater fishing, crabbing and lobster enthusiasts; ideal for both beginners and pros.
•U.S. Patent Pending – This design is legally protected. Imitation discouraged.

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$12.95

$19.95

-35%

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Sportfish Products

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

9.1

ChoiceComparer.com Score

9.1

/ 10

Excellent

Main highlights

•Total ruler size measures 7 inches
•Sturdy plastic construction
•Included is a Safety Float to protect the Crab Gauge if it is Dropped in the Water as Protection
•Measure your crab catch in increments of 4", 4 1/2", 5", 5.25", 5 1/2" and 6"
•Fantastic way to conviently measure your catch
•The Ruler and Gauge sides are in easy-to-read increments allowing convient use and the flexibility to measure multiple species of Fish or Crab

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$7.95

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A1FISHER

A1FISHER Dungeness Crab Gauge Measure with Ruler Multi Shrimp Clam Measuring Tool for Oregon, Washington and California 1PCS

8.9

ChoiceComparer.com Score

8.9

/ 10

Great

Main highlights

•Perfect Measure Tool: A perfect gauge measurement tool for Dungeness and Red Rock crabs, with Both 5-3/4" Measurement (for Red Rock Crab) and The 6-1/4" Measurement (for Dungeness Crab)
•High-Quality: Made of High-density, thick plastic material with clear digital identification and measurement method, it is more convenient and simple when in use.
•Bold Color: The outstanding red color makes it easier to spot and stands out from your other equipment, never misplace this item.
•Convenient: There is a small hole on the top right, which can connect your lanyard. Easy to carry.
•Wide Range of Uses: Accurately Measures the Legal Size of Many Species of Crabs, Clams, and Shrimps, take it with your coming trip.

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$4.99

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Generic

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)

8.8

ChoiceComparer.com Score

8.8

/ 10

Great

Main highlights

•Crab gauge
•Floats
•Maryland Blue Crab
•Maryland

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Generic

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)

8.6

ChoiceComparer.com Score

8.6

/ 10

Good

Main highlights

•MD REGULATION CRAB MEASURING TOOL: Designed to meet Maryland regulations, this crab ruler measures 5" for soft shell and 5.25" for hard shell crabs. Ideal for peeler crab fishing, it ensures you stay compliant while crabbing in local waters, making it a must-have in your crabbing kit.
•FLOATS IN WATER – NEVER LOSE YOUR TOOL: Designed with crabbing in mind, this measuring gauge floats if dropped, preventing accidental loss in the water. Perfect for use on docks, boats, or wading near the shoreline.
•INCLUDES 1" CLAM MEASUREMENT HOLE: Built for more than just crabs, this multi-use tool includes a precise 1" hole for measuring clams, helping you follow shellfish harvesting laws and avoid fines.
•EASY-GRIP HANDLE FOR QUICK MEASUREMENTS: The ergonomic handle ensures a firm grip even in wet conditions, making it easy to measure your catch quickly and accurately without fumbling.
•LIGHTWEIGHT & DURABLE CONSTRUCTION: Crafted from strong, water-ready material, this crab gauge is built to withstand repeated use in the field without weighing down your gear.

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$14.95

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LEE FISHER SPORTS

LEE FISHER SPORTS Universal Plastic Crab/Lobster Gauge - East Coast of USA, Gulf Mexico, Canada

8.5

ChoiceComparer.com Score

8.5

/ 10

Good

Main highlights

•**Must have tool to meet legal regulation and avoid citation
•**Apply to many species, blue crab, stone crab, peeler crab, lobster and more
•**Made of high grade plastic for long years use
•**Easy to carry, store, hang any where
•**Made in Taiwan for quality products.

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$9.11

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