A regulation size Frisbee is a flying disc with a diameter of 27 centimeters (10.6 inches). The weight of the disc must be between 164 and 176 grams (5.8 and 6.2 ounces). The Frisbee must have smooth, even edges with no sharp protrusions. There are also specific regulations regarding the dimensions of the inner and outer rings on the top and bottom of the disc.