What is the maximum allowable size of skin on a fish fillet according to kosher standards?

The maximum allowable size of skin on a fish fillet according to kosher standards is a 1 inch by ½ inch tab. This is relevant because, in kosher laws, specific criteria must be met for fish to be considered kosher. The skin can be left on the fillet during preparation for those fish species that have fins and scales, and the specified dimensions ensure that the skin does not overpower the portion of the kosher fish being consumed.

If the skin exceeds these dimensions, it might create concerns about how it interacts with the fish's kosher status or the way it is prepared. Therefore, the stipulation of a 1 inch by ½ inch tab allows for a confirmation of the kosher status while ensuring that the fish is still presented in accordance with dietary laws.