This is classiting in three groups

 

a) Barky plump hazelnut:This is a barky hazelnut that sizes's are equal to stature or a few different from each other and circular shaped.

b) Barky sharp hazelnut: Barky Hazelnut`s tips  which lengths's are more long on from sizes's is sharp.

c) The Other barky hazelnuts:Barky hazelnuts which are'nt sharp and plump hazelnuts

 

Barky hazelnuts's statures:

a)Very Big ,over 18 mm 

b) Big, over 16 mm

c) Mid, between 13 - 16 mm

d) Small (thin) , under 13 mm

e) Naturel products include all statures according product`s situation of bigness.