If you’re specifying or shopping for a typical two-person urban bench, the numbers you’ll see most often are fairly consistent. A standard two-seat urban bench is usually about 48 to 60 inches long overall, or roughly 122 to 152 cm. That gives each person about 24 to 30 inches of seating width, enough to sit comfortably without feeling crowded.
Seat height is normally 17 to 19 inches from the ground, or 43 to 48 cm. This range isn’t random — it works well for most adults, older people, and many wheelchair users who transfer from a mobility device. The seat depth, measured from the front edge of the seat to the backrest, typically runs 16 to 20 inches, with 18 inches being a very common midpoint. If the bench has a backrest, the top of the backrest usually lands between 30 and 36 inches above the ground, while the backrest rises about 12 to 18 inches above the seat surface.
Armrests, when included, are generally 8 to 10 inches above the seat, and they often help divide the bench into clearer individual spaces. Overall bench depth including the backrest can reach about 24 to 30 inches, but the usable sitting surface stays close to that 18-inch range.
In practical terms, if you are installing a two-person bench in a park, plaza, or streetscape, plan for a footprint around 50 to 60 inches long and 24 to 30 inches deep. For comfort and accessibility, keep the seat height at 17 to 19 inches and avoid designs that slope too aggressively or lack a backrest if people will sit for more than a few minutes. These dimensions are a good baseline — some modern designs are narrower or longer, but the typical urban two-seater still centers on about 48 to 60 inches in length, 18 inches of seat depth, and an 18-inch seat height.