Fire Pit Rings
If you want to go camping or on a picnic, and you want the convenience of a fire pit for cooking and warmth while you are away from home, take a look at a fire pit ring. There are a number of types of rings, many with decorations to add to the ambience.
Generally these come is a couple of sizes. The smaller is 27 inch diameter, and the large size is a 36 inch diameter. Some form a base above the ground, so you can easily deal with the ashes and fire containment when the event is over. Some of these fire rings add a cooking surface or a grill to ease the cooking chores. A few are multisided and will fold flat for storage or travel.
Landmann makes a series of fire rings with decorative sides that is quite popular.