Red Diamond guavas vary in size, depending on the season and growing conditions, but are generally a larger varietal in Taiwan, averaging 8 to 13 centimeters in diameter. The fruits range from 300 to 600 grams in weight, sometimes growing as large as 1,000 grams, and are typically round, oblate, to slightly pyriform in shape with a broad, curved base. The skin ripens from green to lighter shades of yellow-green and the surface is taut, textured, and glossy. In Taiwan, guavas with a bumpier consistency are considered sweeter, more nutritious, and overall, of better quality than smoother-skinned guavas. Underneath the surface, the flesh exhibits variegated shades of red and pink, and the color is darkest in the center, becoming lighter towards the surface. There is also a characteristic pale ring just below the skin. The flesh is firm, dense, thick, aqueous, crisp, and crunchy, encasing tiny light brown to yellow hard seeds. These seeds are edible and can be swallowed but they are not recommended to be chewed. Some Red Diamond guavas may also be almost seedless, containing only a few seeds in the flesh. Red Diamond guavas should feel heavy for their size when ripe and will have a light, floral aroma. Mature fruits are sweet, varying from 8 to 12 degrees Brix, a measurement of sugar, and have a fragrant, fresh, floral, musky, and subtly tangy taste.