17x18 Outdoor Chair Cushions

A 17″ × 18″ cushion fits many patio dining chairs and bistro chairs, where the seat is a little deeper than it is wide. Some chairs measure 18″ × 17″ instead, so check which way round yours is. We make every chair cushion to your exact measurements, including tapered and rounded-front seats.

Build a 17″ × 18″ chair cushionCover only
Cut within ±0.5″Free shippingShips in 2–3 weeksLifetime price match
At a glance

17″ × 18″ chair cushions

Usually fitsDining chairs

Patio dining chairs and bistro chairs with a slightly deep seat.

Thickness2″–3″

2″ for dining chairs, 3″ for more padding. Up to 8″ is possible.

AttachTies

Matching-fabric ties at the back corners are standard. Velcro on request.

Measure

Check your size

Measure the seat at its widest point side to side, then front to back.
If the back of the seat is narrower than the front, note both widths; we can cut a tapered (trapezoid) cushion.
Note where the chair uprights are so ties sit in the right place. See the measuring guide.
17″ wide18″ deep2″ thick · side view
How it works

Order in three steps

1

Open the builder. Your 17″ × 18″ size and a 2″ thickness are filled in; change anything you need.

2

Choose Sunbrella fabric, foam and ties. Not sure on colour? Order a swatch.

3

We cut within ±0.5″ and ship in 2–3 weeks, with free shipping.

Other sizes

Shop by size

16″ × 16″17″ × 17″17″ × 18″18″ × 18″18″ × 20″19″ × 19″20″ × 20″20″ × 24″21″ × 21″22″ × 22″22″ × 24″24″ × 24″25″ × 25″26″ × 26″27″ × 27″28″ × 28″14″ × 36″ lumbarAll sizes
FAQ

Questions

Is a 17x18 cushion the same as 18x17?

Not quite. We list width first, then depth. A 17x18 cushion is 17″ wide and 18″ deep; flip the numbers if your seat is wider than it is deep.

My seat is wider at the front. Can you match it?

Yes. Order a trapezoid cushion with the front and back widths.

Can I order a set?

Yes. Order one cushion or a full set of 2, 4, 6 or more; there is no minimum order.