Itoya Oishii Sakana Protractor (Flounder)

This is an original stainless steel protractor with a fish motif. 90 degrees is a right angle, 180 degrees is a flat angle, and 360 degrees is a flounder angle!? Align the horizontal lines using the cross in the center, the mouth, and the tail fin, then measure the angle. *This product is not intended for precise measurements.