California Spiny Lobster Gauge – 3.25" Legal Carapace Measuring Tool

Keep your catch legal and protect your season with our premium California spiny lobster gauge. Precision CNC-machined in the USA to the exact 3.25-inch carapace minimum size required by California Department of Fish and Wildlife (CDFW) regulations, this heavy-duty gauge is built to withstand years of punishing saltwater abuse without bending, cracking, or corroding.

Crafted from ultra-rigid, UV-stabilized King ColorCore (StarBoard) HDPE, this gauge is the ultimate rust-free, floatable alternative to flimsy metal gauges that scratch your boat's gelcoat or sink to the bottom if dropped. Featuring a high-contrast dual-layer design, it allows you to instantly verify a legal lobster in low-light conditions—whether you are diving at night or sorting hoop nets under a deck light.