The present invention relates to a closure strap for closing packages having a bag-shaped or tubular form, in particular for closing sausage-shaped packages, like sausages. The closure strap comprises a strap body including an elongated stripe portion having a first end and a second end, and an insertion portion having a first end, a second end and an insertion channel. The second end of the insertion portion is connected with the first end of the stripe portion. The second end of the stripe portion forms an insertion end for being inserted into the insertion channel of the insertion portion in an insertion direction. The second or insertion end of the stripe portion and the insertion channel have a substantially round cross section corresponding to each other.

A bag closing device may include an upper surface, a lower surface opposite the upper surface, and a peripheral surface between the upper surface and the lower surface. The peripheral surface may define a first opening and a second opening. The bag closing device may include a first set of protrusions extending into the first opening and a second set of protrusions extending into the second opening.