Chair Risers Made for Your Chair's Legs

Turn the chair upside down on a table. Dining chair legs are usually square or round at the floor, and very often they splay outwards, which means the cut end sits at an angle rather than flat. Measure the widest dimension of the leg at the point where it will enter the riser, then add a quarter inch of clearance to each dimension.

For splayed legs, add a note in the notes box saying the legs are angled and roughly how far out they lean, so the opening can be cut at a matching angle and the whole cut face of the leg beds down inside the riser. This matters more on a chair than anywhere else: if an angled leg rests on one edge of a flat opening, the contact point is tiny and the chair will rock.

Front and back legs are often different. On many dining chairs the back legs are thinner and angled, while the front pair are straight and slightly thicker. Measure both pairs and, if they differ, add two lines to the cart, two risers of each size, rather than forcing one size to cover both.

The gap between the seat and the underside of the table is what makes a dining set comfortable. Measure that gap now, and if you have raised your table, raise the chairs by the same amount to keep it. A lift of one to three inches is the usual choice, and past that the sitter's feet stop reaching the floor, which is less stable rather than more.

A wide base with a short lift is the steadiest combination on a chair. Office chairs on a five-star caster base are not suited to risers at all; use the chair's own gas cylinder adjustment. High stools, rocking chairs, recliners with moving mechanisms and folding chairs are also poor candidates, because their center of gravity already moves during use.

Whatever height you choose, put risers under every leg, keep all four on level flooring, and check them again after a week of use. A chair that gets dragged will work its legs loose in a way a bed never does.

A dining chair is light, so almost all the load is the person in it. That load is dynamic: sitting down drops a body weight onto two legs at once, and people lean back, tip onto rear legs, and shift sideways. A chair riser therefore sees a higher peak load per riser than a bed riser under the same total weight.

Enter the weight of the heaviest person likely to use the chair, plus the chair itself, in the configurator's weight field. The reinforced build is the sensible default on a chair riser used by an adult, and a raised chair should never be tipped or rocked. If a chair is used by children who climb, kneel or swing on it, risers are not the right answer.