Thomas Martin founded Fincut in Paris in May 2023 around one product: a fitted T-shirt engineered to broaden the shoulders and chest while smoothing the midsection, developed through what the brand calls its Sizetech+ textile technology. A revised second version followed in December 2023, refining the fit after months of testing. The brand has stayed centered on that core piece, shipping out of its own unit in France to the rest of Europe.