A blank for forming a trapezoidal display box with cutting and creasing design, consisting of a sheet of cardboard paper, comprising: - a base delimited by first and second side creases (2,3) and the first side creases are defined as having cutouts with an arrow end; - a bottom extending from one of the second side creases, said bottom being delimited by third side creases, interrupted by a male coupling consisting of a cutout with angled extremities and including a flap with a male locking tab; - a side face extending from a fourth crease of the bottom, said side face being delimited by fifth side creases, and each fifth side crease being equally interrupted by a male coupling; as well as an opposite crease, interrupted by a pair of male couplings, but arranged in a transversal position to the fifth side creases; - a top, extending from the other one of the second side creases of the base, delimited by sixth side creases, also interrupted by respective male couplings, said top having a center cutout which delimits a semi-circle flap and having, in a free edge, a folding crease of a female coupling with a reentrant flap, being delimited by cutouts and including a locking tab with a crease interrupted by a rectangular center cutout, opposite to a semi-circular cutout, forming a female coupling; - front faces extending from each first crease of the base, with free edges equipped with a folding crease of female couplings protruding from a peripheral edge; and - an angled coupling flap extending from the front faces defined by a coupling end with a supporting part, of smaller height and, on the opposite side, a stop with a displacement part, also receiving reinforcement in an inner face; the blank being configured to be folded and form a display box, with wider top suffering gradual reduction in the perimeter of the bottom, in trapezoidal geometry. - a base delimited by first and second side creases (2,3) and the first side creases are defined as having cutouts with an arrow end; - a bottom extending from one of the second side creases, said bottom being delimited by third side creases, interrupted by a male coupling consisting of a cutout with angled extremities and including a flap with a male locking tab; - a side face extending from a fourth crease of the bottom, said side face being delimited by fifth side creases, and each fifth side crease being equally interrupted by a male coupling; as well as an opposite crease, interrupted by a pair of male couplings, but arranged in a transversal position to the fifth side creases; - a top, extending from the other one of the second side creases of the base, delimited by sixth side creases, also interrupted by respective male couplings, said top having a center cutout which delimits a semi-circle flap and having, in a free edge, a folding crease of a female coupling with a reentrant flap, being delimited by cutouts and including a locking tab with a crease interrupted by a rectangular center cutout, opposite to a semi-circular cutout, forming a female coupling; - front faces extending from each first crease of the base, with free edges equipped with a folding crease of female couplings protruding from a peripheral edge; and - an angled coupling flap extending from the front faces defined by a coupling end with a supporting part, of smaller height and, on the opposite side, a stop with a displacement part, also receiving reinforcement in an inner face; the blank being configured to be folded and form a display box, with wider top suffering gradual reduction in the perimeter of the bottom, in trapezoidal geometry.