Santol fruits are round and around 25% bigger than a tennis ball. The skin is leathery, somewhat fuzzy, and wrinkled, ripening from green to golden yellow, and is sometimes covered in a red blush.
Santol fruits also have a translucent to white pulp that encases 3 to 5 inedible seeds. The pulp has a cotton-like consistency and is juicy, slippery, and soft. Santol fruits range in flavor from sour to very sweet, depending on maturity and variety. The sweetest Santol fruits have a candy-like taste with mild peach and apple notes, while in the sour varieties, a strong umami aftertaste may linger on the palate.