Inner and outer diameter: why both figures matter
This is the one piece of knowledge that saves people a wasted weekend. A ring has two diameters and they do different jobs:
- Inner diameter is the fire you get. It decides the seating circle and whether a full-length split fits.
- Outer diameter is what your stone course has to accommodate. Build the surround to the inner figure and the ring will not drop in.
The gap between them is the ring’s wall and flange. On the picks here it runs from two inches (SoulMate, 40 outer to 36 inner) to six (Sunnydaze, 42 to 36). A bigger gap generally means a heavier ring and a more substantial flange sitting on top of your stone, which is a good thing structurally — and a bigger hole to build. Decide the fire size first, then build to the outer figure the listing publishes.
Two of the rings here publish only one diameter. For those, measure the ring on arrival before you lay the final course, or build the surround slightly generous and backfill. It is a small thing and it is also the most common reason a ring goes back.
What size fire ring do you need?
Size to the seating circle, not to the garden — the same rule as any pit, and our sizing guide works it properly. In short:
- 28 inches: four to six chairs. Manageable wood use. The default.
- 36 inches: six or more chairs, and the first size that takes full-length splits without cutting them down.
A 36-inch fire burns noticeably more wood per evening than a 28-inch one. If you do not already have a seasoned stack and a rack, a 36-inch ring is a standing commitment to feeding it, which is why we recommend 28 to most people despite 36 being the size everyone searches for.
Smokeless fire pit ring or plain ring?
A smokeless ring is double-walled: it draws air up between the two skins, preheats it, and feeds it back in above the fire, which burns off most of the smoke particles. It works. It works on hot fires and dry wood, and not otherwise — the EPA’s figure is that wood burns best below 20 percent moisture, and a wet log smokes in a smokeless ring exactly as it does in a bucket. That caveat is the same one we apply to every smokeless fire pit on this site, including the expensive branded ones.
A plain single-wall ring has no airflow gap, which means nothing to clog with ash, nothing to mis-stack, and identical behavior whether your wood is dry or damp. If your firewood situation is honestly not under control, a plain ring and a moisture meter will make you happier than a smokeless ring and optimism.
Fire pit vs fire ring: which do you want?
The distinction people are usually reaching for:
- A fire pitis a finished product — a bowl, legs, often a screen. It arrives, you use it, it can move. Nothing to build.
- A fire ring is a steel liner for a pit you build into the ground or into stone. Cheaper, permanent, and it looks like part of the garden.
The ring wins on cost per inch of fire by a wide margin and loses on flexibility completely. Once the stone is laid, that is where your fire is forever. Before you lay anything, check clearances: Smokey Bear’s guidance is to clear at least a 10-foot area around an outdoor fire, stay 15 feet from vegetation and low-hanging branches, and keep vertical clearance of at least three times the flame height. A built-in pit sited under a tree is a mistake you cannot undo with a wheelbarrow. Read fire pit safety before you dig.
What else the build needs
A ring, a surround and a plan for drainage — a built-in pit with no drainage becomes a pond, and then an ice rink, and the freeze-thaw cycle is what lifts stone. Gravel base, and do not seal the bottom.
Then the cheap things that decide whether the pit gets used: a spark screen and long tools, because a 36-inch fire is not something to reach into with a 26-inch indoor poker, and a cover if the ring will hold water between uses. Then chairs, because a seating circle with nothing to sit on is a hole full of ash.
A ring is the wood-burning version of a fire pit kit. If the fire is going to run on gas instead, the equivalent purchase is a drop-in burner kit, and best fire pit kitsranks those — burner kits, complete boxed block kits and what each one still leaves you to buy.
Insert or finished pit?
A 36-inch smokeless ring in a surround you build is the cheapest route to a genuinely wide fire, and a finished pit is the cheapest route to no building at all. Best large smokeless fire pits puts both options in one ranking, so you can see what the premium 27 and 30-inch pits cost against the insert route.
