Abstract: An extendable smocking tube having a first elongated tubular body, a second elongated tubular body and a stopper. The second elongated tubular body is inserted into the first elongated tubular body such that the second elongated tubular body is coaxial and movable with respect to the first elongated tubular body between a closed position and an extended position. Density of the second elongated tubular body is greater than density of the first elongated tubular body. The stopper is positioned at the first end of the second elongated tubular body. The lengths of the first and second elongated tubular bodies are selected such that a protrusion is formed at the second end of the second elongated tubular body with respect to the second end of the first elongated tubular body when the second elongated tubular body is in the closed position.