Pick a grapefruit that has smooth, firm skin, and that feels heavy for its size. Avoid any with blemishes, any which are overly soft or have uneven soft spots. The skin should be yellow and may have a blush of pink or a little green.
How to Store
Despite their size, grapefruits can be quite fragile. Handle with care between the store and home. Grapefruit can last up to a week on the counter or up to two weeks in the fridge.