Enough to fill 12 gourds or 24 compartments in your martin houses. Pine needles are the preferred nesting material for purple martins. Quick to dry, pine needles are protected by natural pine oils that repel water. Safe for eggs and young, pine needles have been show to be the best nest material to use when doing nest changes.
On average one would use 2 small handfuls per troyer gourd and 1 handful per nesting tray.
A "small" size (PN12) box measures 12 x 12 x 6