On a maroon disc shaped embroidered item edged 1/16 inch (.16 cm) yellow border displaying a yellow eagle in flight facing the left side; all within a maroon designation band edged with a 1/8 inch (.32 cm) yellow border, with the inscription LINDBLOM at the top and below HIGH SCHOOL, in white letters. Overall diameter is 3 inches (7.62 cm).

Gold and maroon are the school colors. The eagle is the school's mascot. 

The shoulder sleeve insignia was originally authorized 24 August 1972, currently amended to update the manufacturing drawings on 19 July 2016. (TIOH Drawing Number A-10J-1141)