They are made from double-sided hook-and-loop fastening material (hook and loop fabric).
The listed width is 1.5 inches (1-1/2").
The available product details state they are made in the USA.
It’s a single strip of double-sided hook-and-loop fastener that quickly wraps around items and holds them together.
One overall dimensions entry lists 3.5 inches (H) x 1.5 inches (W) x 15 inches (D). If precise measurements are important, confirm the exact listing details before purchasing.