Italian to English Law/Patents Law (general) Estates

In a document prepared by a notary to make public a holographic will, there is a description of the document indicating that the will is "costituita da un foglio a quadrattini". It seems for one thing that the last word should be spelled quadratini, but can anyone confirm what type of paper this would be? It sounds like graph paper to me.

I understand that such a will can be made on any type of paper and that perhaps graph paper was used because it was the only thing available.

Many thanks in advance for your ideas on this!