Abstract: Needlepoint sheet having channel perforations with octagonal upper and lower openings. Thread drawn through a channel in a diagonal direction is pulled over a flat surface which widens the area covered by the thread. The needlepoint sheet is made of a polymeric material. The perforations are preferably formed into a plurality of aligned rows for receiving the thread. Each channel is enclosed by eight sides which form octagonal upper and lower openings. The width of each of the sides is substantially equal. In a preferred embodiment of the invention each of the sides form a plane, and the height of each of the side planes is substantially equal. In a preferred embodiment of the invention each of the side planes merge along a curved portion of the wall. This distributes the stress during bending of the needlepoint sheet, and reduces cracking and breakage thereof. In use thread is extended through the channels.