Thai pomelos are large in size, averaging 15-25 centimeters in diameter, and are globular to oblate in shape. The rind is smooth, semi-firm, light green, and pebbled with many small oil glands. Underneath the surface, there is a very thick, cotton-like pith that is white, spongy, and can reach up to twelve centimeters in width. The pith is attached to light green-yellow flesh, which is divided into 9-14 segments by fibrous membranes.
The flesh can be dry or very juicy, depending on the individual fruit, and also seedless to containing many seeds. Thai pomelos are soft and have a sweet-tart flavor with citrus notes reminiscent of grapefruit.
That thick peel means pomelos can hang out on on your counter, but it's still probably best to store them in the refrigerator