Leather leaf is an inexpensive fern that holds up well, is easily cut into different lengths and is used in every flower shop.
The grower's bunch is packed by weight - not by number of stems.
You can see the laterals are easily cut apart if you desire.
You don't need bunches and bunches - often one bunch can green up a bridal bouquet and four attendants. Use my free Wedding Flower Calculator to put your budget money to good use and buy only what you need.
A top view of a typical (one brick) arrangement shows the leather leaf coming out from the sides and gradually moving the direction up and out - and eventually straight up in the center. This gives dimension to your design.