Interesting Vintage Newel Post Finial, Old House Salvage. This piece has nice styling, a great patina, and it is wood and possibly oak. The finial is approx. 6" tall measuring to its second rim. There are two lower rims and the bottom rim has edges chipped away so you may want to trim this down to even it out. Or locate the chipped edges out of sight. The diameter of the bottom rim would be approx. 3 1/2" if it was whole. The rim above it looks to have a diameter of approx. 3" but it is hard to measure.  The finial is approx. 3 1/4" across at its belly. The square dowel at the bottom is approx. 2" x 2" and 1 3/4" long. The piece has some wear including some finish wear, nicks, gouges, and an old nail hole. Selling as-is.

This very handsome old finial would add flair to your next project!