A conveyor belt comprising: a belt body configured to be positioned along a non-rectilinear path; at least one rotatable portion coupled to the belt body and configured to turn relative to the belt body; wherein the rotatable portion comprises a plurality of sub-elements, with each one of said sub-elements being rotatably connected to an adjacent sub-element and having: - a top face, - a bottom face, - first opposite side portions extending between the top and the bottom faces (17a, 17b) of each sub-element, and - second opposite side portions extending between the top and the bottom faces (17a, 17b) of each sub-element, wherein each one of the sub-elements further comprises: - first annular features emerging from each one of the first opposite side portions, wherein the first annular features emerging from each first side portion are equal in number to the first annular features emerging from the opposite first side portion, - second annular features emerging from each one of the second opposite side portions, wherein the second annular features emerging from each second side portion are equal in number to the second annular features emerging from the opposite second side portion, wherein the first annular features of a sub-element mate with the second annular features of an adjacent sub-element forming a coupling seat located between the two adjacent sub-elements and extending along an axis of rotation, wherein each of said sub-elements has four side portions defined by two first opposite side portions and by two second opposite side portions, and wherein, for each of said sub-elements: - the first annular features emerging from a same first side portion are coaxially aligned along a respective axis of rotation, and - the second annular features emerging from a same second side portion are coaxially aligned along a respective axis of rotation, and wherein at least one pin is inserted in each said coupling seat formed between the two adjacent sub-elements to rotatably connect the two adjacent sub-elements, characterized in that in each one of said sub-elements: - the first annular features emerging from each first side portion are one more in number of the second annular features emerging from each second side portion. a belt body configured to be positioned along a non-rectilinear path; at least one rotatable portion coupled to the belt body and configured to turn relative to the belt body; wherein the rotatable portion comprises a plurality of sub-elements, with each one of said sub-elements being rotatably connected to an adjacent sub-element and having: - a top face, - a bottom face, - first opposite side portions extending between the top and the bottom faces (17a, 17b) of each sub-element, and - second opposite side portions extending between the top and the bottom faces (17a, 17b) of each sub-element, - a top face, - a bottom face, - first opposite side portions extending between the top and the bottom faces (17a, 17b) of each sub-element, and - second opposite side portions extending between the top and the bottom faces (17a, 17b) of each sub-element, wherein each one of the sub-elements further comprises: - first annular features emerging from each one of the first opposite side portions, wherein the first annular features emerging from each first side portion are equal in number to the first annular features emerging from the opposite first side portion, - second annular features emerging from each one of the second opposite side portions, wherein the second annular features emerging from each second side portion are equal in number to the second annular features emerging from the opposite second side portion, - first annular features emerging from each one of the first opposite side portions, wherein the first annular features emerging from each first side portion are equal in number to the first annular features emerging from the opposite first side portion, - second annular features emerging from each one of the second opposite side portions, wherein the second annular features emerging from each second side portion are equal in number to the second annular features emerging from the opposite second side portion, wherein the first annular features of a sub-element mate with the second annular features of an adjacent sub-element forming a coupling seat located between the two adjacent sub-elements and extending along an axis of rotation, wherein each of said sub-elements has four side portions defined by two first opposite side portions and by two second opposite side portions, and wherein, for each of said sub-elements: - the first annular features emerging from a same first side portion are coaxially aligned along a respective axis of rotation, and - the second annular features emerging from a same second side portion are coaxially aligned along a respective axis of rotation, and - the first annular features emerging from a same first side portion are coaxially aligned along a respective axis of rotation, and - the second annular features emerging from a same second side portion are coaxially aligned along a respective axis of rotation, wherein at least one pin is inserted in each said coupling seat formed between the two adjacent sub-elements to rotatably connect the two adjacent sub-elements, characterized in that in each one of said sub-elements: - the first annular features emerging from each first side portion are one more in number of the second annular features emerging from each second side portion. - the first annular features emerging from each first side portion are one more in number of the second annular features emerging from each second side portion.