Rigelene type boning a.k.a. White 10mm wide
10mm wide woven boning (just over 3/8 inch wide) - not a good option for corset making, but great for building structural shapes like oversized puffed sleeves and supporting garments. This is actual Rigilene, it's stiff and strong.
The grid is made up of 1/4" squares.
Made in China