Many thanks to the brilliant David Nolan who sent me a link to a set of Fibonacci knives. Yes, Fibonacci knives. Although the designer, Belgium-based Mia Schmallenbach calls them Nesting Knives.
"Meeting is a set of kitchen knives: paring knife, carving knife, chef's knife, filleting knife and a block. They all appear to be sculpted from a single piece of stainless steel. The proportions are determined by the Fibonacci sequence using the average width of a human hand as its base. "Made in France by Deglon.