First, you would need to determine how many inches of braid is needed for the perimeter of a blanket.
(23 × 2) + (24 × 2)
46 in + 48 in = 94 in
Next, you would need to do is convert inches to meters.
1 inch = 0.0254 meters
94 in × 0.0254 m = 2.3876 meters
Now, since braid can only be purchased by the full yard, you would round up.
2.3876 meters ≈ 3 meters
You would need 3 meters of braid.
I hope this helps!