These hazelnuts are grown from seeds from Barcelona European Hazelnut (Corylus avellana), an early ripening variety used in commercial production.
These bare-root seedlings are between 1 and 2 feet tall.
Sale to OR, WA prohibited: https://www.nationalplantboard.org/state-law--regulation-summaries.html
Photo credit: I, Colae, CC BY-SA 3.0 <http://creativecommons.org/licenses/by-sa/3.0/>, via Wikimedia Commons