Short answer
Plan for 12 to 16 in of overhang on the seating side of a counter-height island.
That gives the knees of a seated adult room to fit under the countertop, so the stool can be pulled in close enough to eat. We would not go below 10 in, and that only for short meals; with less than that, most people sit sideways.
The table shows what each overhang depth allows. The deeper end of the range makes long meals more comfortable and suits taller people; the shallower end suits islands used mainly for breakfast and coffee.
| Overhang | What it allows |
|---|---|
| Under 8 in | Perching only; knees hit the cabinets, so people sit sideways |
| 10 in | Short meals and coffee; our minimum for seating |
| 12 in | Comfortable everyday meals for most adults |
| 14 to 16 in | Long meals, working at the counter, taller people |
| Over 18 in | Table-like seating; supports as your countertop supplier specifies |
Yes, slightly. At a typical bar-height counter of 39 to 40 in, people sit higher and their knees angle down more steeply, so our planning range there is 10 to 12 in.
At a standard counter height of 35 to 36 in, the knees sit further forward, and we recommend 12 to 16 in.
Height and overhang work together with legroom. As a rule of thumb, the seat should be 9 to 10 in below the underside of the countertop, and the overhang must give the knees somewhere to go at that height. Our bar stool height guide covers the vertical side of the same problem, and our guide to legroom and knee clearance puts the two together.
Often, but that depends on the countertop, not on the stools.
How far a countertop can project without support is a structural question that depends on the material and its thickness, and the specification of your countertop or stone supplier applies, so confirm it before the island is built. Our overhang figures are comfort guidance, not structural limits. Where support is needed, it usually takes the form of hidden steel brackets, corbels or legs.
The problem with supports is where they end up: under the overhang, exactly where knees and armrests go. Plan their positions with the stools, not after them. A support at the knee position of a seat makes that seat useless, while a support between two seats is barely noticed.
Put supports between the seats, not in front of them.
With stools spaced 21.5 in center to center, the gaps between seats fall every 21.5 in along the island, and brackets or legs placed there stay out of the way of knees. At the ends, a leg at the corner frames the seating without blocking it.
Flush-mounted steel brackets hidden inside the cabinet are usually the least intrusive option, because they leave the underside of the overhang clear. Visible corbels and legs work too, as long as they line up with the gaps. If you have not yet chosen your stools, plan for 21.5 in spacing as a starting point; slim stools such as Svea and Freja need only 19.5 in, and Carl, our widest stool, 23.5 in.
A little. Stools with armrests need the armrests to pass under the countertop edge when pushed in; on Bruno the armrest tops sit at 33.9 in with a 26 in seat, below a standard counter.
Backless stools slide in until the seat meets the cabinets, so a deeper overhang hides more of them.
Seat depth matters for tucking stools away: our seats are 14.5 to 17 in deep, so a 16 in overhang lets most backless and low-backed stools disappear almost completely under the countertop. That is worth planning in a narrow kitchen where the stools must be out of the walkway. See backrest vs backless stools for how each type tucks in.
The same as along the side: we recommend at least 12 in for one or two stools on the end, which is often the best way to add seats to a short island.
A seat on the end also needs the usual 35.5 in of clear floor behind it.
On an L-shaped island, give both legs of the L the same overhang and keep the inside corner free for about 12 in on each side, where knees would collide. For the full picture of island seating, including height, spacing and floor space, see the kitchen island seating guide.
Eva Counter StoolFrom $529Backless · tucks under
Svea Counter StoolFrom $399Backless · slim steel
Freja Counter StoolFrom $399Low back · steel
Bruno Counter StoolFrom $529Armrests · long meals
