A near-native, the range of this species extends from Quebec east to the coast.
In the relatively sandy soil, dryish areas that these are planted at my place they grow to around 2’ in height and are slow to spread. In their preferred conditions of high moisture availability and high organic matter soil they can reach 6’ in height. I suspect that they would roughly split the difference in a conventional garden setting.
The close-up photos are from the plants I tend, the larger patch is a photo by Laval University via Wikimedia Commons
Prairie Moon has a fun and fanciful description of this species here https://www.prairiemoon.com/sanguisorba-canadensis-american-burnet-prairie-moon-nursery.html
