Price is for one rhinestone strawberry.  Dark green and light green in the listing choice refers to the leaf color at the top of the strawberry. See measurements below: 

Small: 16.6x17.5mm, 3mm hole - These will be referred to as 16mm for the listing choice

Large: 20.4x21.6mm, 3.0mm hole - These will be referred to as 20mm for the listing choice