What the convention boils down to
An unhooking mat exists so a fish is never put on gravel. Once the fish is lying on it, a tape printed along the edge turns the measurement into a single reading — no sling, no tare, no second lift.
The corpus shows how universal this has become: the phrase « mit Maßband » is in the title of nearly every mat, and the cheapest products on the shelf are tapes with a bump board and almost no padding at all. Those are measuring boards rather than mats, and the pages say so.
The dimensions matter more than the tape. A wide mat holds a fish that cannot roll off; a long narrow cradle is lighter, packs smaller and is really for predator fishing.
What it does not promise
It does not promise accuracy. A printed scale on a flexible material is not a certified rule, and no listing claims a tolerance.
It does not promise the fish will lie still, which is what the handles on the better mats are for — a wet mat with a fish on it is carried, not dragged.
It does not replace a weight where a weight is what is wanted.
And it does nothing at all if the mat is dry when the fish arrives.
Where it shows up on this site
On the unhooking mat shelf, as the feature that separates a mat from a cradle and both from a tape. It is read against the dimensions in centimetres, the padding, the handles and whether the mat is waterproof and foldable.
It is read alongside the landing net and the keepnet pages, because the three objects are one sequence: out of the water, onto something soft, measured, back.
How it is read here
A page prints the tape length and the mat dimensions as the maker printed them, in centimetres, and says which of the two formats a product is. Where a listing sells a tape as a mat, the page says that in those words.
The questions that keep coming back
Is a measured length as good as a weight?
For the fish it is better, because it is one handling instead of two. For a record it is not a substitute, because records are kept on weight. For everything in between it is the faster and gentler reading.
How wide should the mat be?
Wide enough that the fish cannot roll off it, which is the whole function. The corpus shows two formats: a wide mat and a long narrow cradle, and the narrow ones are really measuring boards.
Is the printed tape accurate?
Nobody certifies it. It is ink on fabric or plastic, and it stretches with the material it is printed on. The pages report the stated length of the tape and do not claim a tolerance nobody published.
Why wet the mat first?
A dry mat takes slime off a flank, and the slime coat is the fish’s own protection. Several mats in this corpus advertise being waterproof and foldable for exactly this reason: the mat is meant to be wetted before the fish touches it.
Last reviewed 22 September 2026