A blank is provided which has a chassis of corrugated cardboard where a series of a quadrangular closure flap, a quadrangular cover panel, a first quadrangular lateral panel, a quadrangular bottom panel and a second quadrangular lateral panel are individuated by crease lines. Each panel is provided with left and right quadrangular flaps, respectively. The blank has four compression members of corrugated cardboard glued to an internal face of the chassis in correspondence of areas bordering the first and second quadrangular panels and the respective left and right quadrangular flaps. A box obtainable from the blank by folding is also provided.