Endless addictive fun as you learn to "flip" and twirl this Butterfly knife for fun or practice. Also known as a Balisong, this is a functional Butterfly knife knife. Expect hours of fun from this Butterfly Knife. Approximate Length closed 4.25inches, width 1 inch. Approximate Length open 7.75 inches Made from biodegradable plant based material that is nontoxic and 3D printed. It can be printed in a variety of color combinations at no extra charge. Fun for parties! This is just a plastic toy designed for cosplay or practice. Being that it’s plastic it cannot be sharpened Great for Parties!!! Party Pack includes 10 butterfly knives (1 of each color)