Bachelor's buttons (aka cornflowers, bluebottles) are blossoms comprised of delicate, feathery florets. They are sold in a blend of blossom colors that can vary with availability.
Bachelor's button petals are mild, slightly grassy, and relatively tender. The florets are attached to a base stem that is tough and should be removed (separating the florets) before using these flowers as an edible garnish.
As a rough estimate, bachelor’s buttons range in size from 1” to 1 ¼” blossoms with attached stems that range from about ¼” to 1” long.