The liner is a 30 inch diameter cylinder, that is 12 inches tall. (made in two halves for shipping) Depending on the height of your blocks, I can make the cylinder shorter. If you want something taller, there would be additional cost for the liner and for shipping.
The top ring is around 45 inches in diameter and fastens to the liner with bolts that are included. This ring is as large as I can cut in one piece on my cutting table. I certainly can make a custom ring in a larger size. It would have to be in sections that bolt together, and would be considerably more expensive. Feel free to email me if you have any questions.
The top ring is cut from 12 gauge steel and the liner is 1/8 thick steel. They can be left unpainted for a rustic appearance or as shown, painted with a black, high temperature grill paint. There is no paint made that will stand up to direct exposure to fire, so the inside of the liner will need to be repainted regularly.
You will need retaining wall blocks that are small enough in width to make a 30 inch inside diameter circle, and at least 8 inches in depth, so the top ring doesn't stick over the outer edge of the blocks. The height can be whatever you would like.
I can only ship these to the lower 48 United States, and cannot ship to a P.O. box.
Thanks for looking, please email if you have any questions, and be sure to check out the other items in my store.