This white is linen and naturally is matte like a white cotton or linen shirt.
Our pocket squares have beautiful hand rolled edges and mitered corners.
Around 15 inches square / 38 centimeters.
Growing up in the 50-60s men in my family wore white, cotton handkerchiefs in TV folds bought by the dozen at long vanished department stores. A step up was Irish linen with no little angst over the price. Belgian was a tablecloth brought out for holidays like the Shroud of Turin under guard by your grandmother.
Buy yourself 2 or 3; still less than that month of groceries bought during the Cuban Missile Crisis. They're worth it!