Pictures shown are mature trees for sake of reference. 
This product is sold in seedling size (18-24") bundles of 25.
(Not full grown)
 
Genus:Corylus
Family:Betulaceae (Birch)
Life cycle:perennial woody
Origin:nativeHabitat:part shade, shade, sun; moist to dry; open woods, thickets, savanna, prairie
Bloom season:April - May
Plant height:4 to 16 feet
 
The nuts are very good eating, though smaller than commercially grown hazelnuts (a.k.a. filberts) so it takes a lot to make a handful. It is usually also a race to beat squirrels and other wildlife to the the punch. It strongly resembles the related Beaked Hazelnut (Corylus cornuta), which lacks glandular hairs on twigs, leaf stalks and husks, and the husks have a distinctive, long beak. The two species' ranges overlap and may be found growing side by side, but Beaked Hazelnut is more common in moister sites and American Hazelnut in drier sites.
 
Excerpted from and for more information see: https://www.minnesotawildflowers.info/shrub/american-hazelnut