These Nest Box bottoms will fit your standard box and are made out of a durable, double walled, corrugated plastic that can be easily cleaned. These are cut to be 12" deep and extend 16" wide when laying completely flat. There are scores cut 4" on each side to allow them to bend up and form a more comfortable " \__/ " shape for your ladies nesting instincts. You can add a shelf liner/gripper to these to make egg landing a little softer, I use straw, myself. Please send me a message if you need your liners to be shorter or deeper than the 12" depth. I can make different sizes (PM the quantity you'd like and the size) for anyone looking to purchase custom liners. Regular Pricing, Includes Shipping: 1 @ $5 buy 3, get 2 free (5 for $15) buy 5, get 5 free (10 for $25) Feedback is always appreciated!