Shells are curved architectural structures with rigid surfaces and small thickness, widely used for covering large spans without intermediate supports. Commonly applied in urban furniture in ferrocement, their use has been limited due to corrosion issues in the steel mesh. This work presents a new concept of cementitious shells using reinforcement with layers of natural jute fabric. Produced through a hand layup process, cylindrical shells with four fabric layers and two different arc lengths were subjected to three-point bending tests to evaluate mechanical behavior and failure modes. The effect of arc length on shell deformation was numerically assessed using Karamba software. The results demonstrated that the addition of jute fabric enhances the shell's load-bearing capacity due to stress redistribution after the formation of a plastic hinge and the first crack in the matrix. This stress redistribution leads to the development of new cracks on the upper surface of the shell. The arched geometry increases the load-bearing capacity of the shells compared to flat shells. However, cylindrical shells with a height of 150 mm exhibited lower bending stiffness and lower maximum bending load than shells with a height of 75 mm, due to the increased eccentricity.