Here is a good size comparison for our peony bud heads. There is an old grading scale for peonies established back in the early 1900's but Alaska Peonies tend to top right off of that scale, so we are a grade of our own!
For a special display peonies can be submerged in water to create an ethereal effect. Petals on lighter colored peonies will become almost see-through after a few days. Here we have a Festiva Maxima peony and bud.
Sarah Bernhardt peonies are one of the most recognized varieties out there. Did your grandmother grow pink peonies? This would have been her bloom. Rootstock of this variety was brought with settlers in the Conestoga wagons as they came west. A classic pink bloom with a wonderful scent!