Cut strips by layering blocks of fleece or flannel the length of the strips you want for your fringe and have the length of the strips running with the selvage: do not run the length across the material.
Layer 4 pieces of material (right sides up) each time using 24 inches X 7 or 8 inches (whatever length you prefer). Divide the 24 inch piece into 3 blocks of 8 x 8 inch squares, then cut the blocks into nine 1/2 to 3/4 in. strips using the straight edge and cutting mat as guides.
In the picture the three strips inserted into the blanket on the left are 8 inches and on the right: 7 inches. I just “eyeballed” the measurement of width of the strips; no need for such precise measuring. The blade cuts 10 and 1/2 holes per every 12 inches of material, therefore you will need approximately 36 strips per linear yard of material. Example: a 3 foot square blanket would require approximately 144 strips of fringe.(See picture.)
I used a 60mm straight blade in this project for the strips. This saves a lot of time.