This pen cost $40 to make and took exactly 3 hours and 7 minutes to complete. The design can be altered to an octagon or to any size. Since it is a one piece non-assembly object, make sure it fits through your doorway. This project requires 10 (2x4) bards 8 feet long, 2 boxes of 2.5" wood screws, glue, cordless drill with a 3/16" or 1/8" drill bit - phillips bit, a table saw and a miter saw. Also protective eye wear for sawing.