It all depends on where you get your material. Remember to call and have all your under ground pipes and wires marked. To get a round shape I used a piece of PVC, it was probably 3' diameter, that I got from a farmer that used it to supply water to his fields. I just dug the hole a bit bigger than the PVC and filled with concrete in between the ground and the PVC. I Then Put a brick they sell at Wal-Mart around the top edge before it dried. It looks like its all brick. I stacked them about 3 bricks high and used the concrete as a mortar. Then about a week later when it was all dry I mixed up some more concrete and put some in the bottom (removed the PVC first) and let it set. About a week later we used it. And we used it a lot. We also had expanded metal Cut to the size of the pit so it can double as a grill. Just remember to have handles welded on if you do this. This is so when you need to add wood you can remove the metal with gloves. Smores + fire pit + beer = a good time. I bet you could get something similar to the PVC I used, like maybe culvert. You could also just do it with all brick. I hope this helps. Good luck. And remember to get it how you want it the first time. I ended up digging up the one I described to build a bigger one. And the second time around it was pricey. To buy all new materials it could vary in price depending on how you choose to do it.