CHINESE POMELO is citrus maxima so named because it is the largest citrus there is. It is commonly called PAMPELMUSA, common grapefruit name in German and French (pampelmuse, pampelmousse ) being pampelmousse chinois chinese grapefruit. There are giant grapefruits the size of the human head, but they are usually a large pear size and ovoidal to almost spherical in shape, with color that changes from green to orange and lemon yellow.