A rectangular device with arced scroll attached above and below the device, the overall dimensions 3 1/2 inches (8.89 cm) in height and 2 1/2 inches (6.35 cm) in width consisting of a white background edged with a 1/8 inch (.32 cm) maroon border, on which is centered the maroon head of a wildcat affronté couped detailed black and white with a red tongue. On the upper white scroll edged with a 1/8 inch (.32 cm) maroon border the inscription "PLANO" and on the lower white scroll edged with a 1/8 inch (.32 cm) maroon border the inscription "WILDCATS" in maroon letters 5/16 inch (.79 cm) in height.
The school colors are maroon and white. The wildcat is the school mascot.
The shoulder sleeve insignia originally authorized 13 March 1975, was amended 3 October 2006, to update the description, add symbolism, add metric measurements, add cable numbers, and provide manufacturing drawing. (TIOH Drawing Number A-10J-771)