Sofa seat depth and height: how to find the comfort that suits you

Seat depth is the usable part of the seat: from the front edge of the cushion to the face of the back cushion, where your back actually rests. It is not the same as overall depth, which runs from the front of the sofa to the back of the frame and is usually 30 to 40 cm more, because it includes the back cushions and the frame.

Not every brand measures the same way. Some quote the depth to the frame behind the back cushions, which makes a seat look deeper than it feels. When you compare two sofas, ask where the measurement ends.

Seat height is measured from the floor to the top of the seat cushion, with nobody sitting on it. A soft seat sinks a few centimetres more than a firm one once you sit, so two sofas with the same seat height can feel quite different.

These are general ranges rather than strict rules, because leg length, the angle of the back and the softness of the cushions all change the feel. A deep seat with plump back cushions can sit shallower than its number suggests, and a thin, upright back makes a seat feel deeper.

If you like to sit cross-legged or with your feet tucked under you, a common habit on long evenings at home, a deep seat is not a luxury: it is what makes that position comfortable.

1. Sit on the chair or sofa you find most comfortable, with your back against the backrest.
2. Check the gap between the front edge of the seat and the back of your knees. Two or three fingers' width, about 5 to 8 cm, is a comfortable gap for upright sitting.
3. Measure the seat depth of that chair or sofa. That number is your upright depth.
4. If you like to lounge, add 5 to 10 cm to it.

You can also measure your thigh while seated, from the back of your hips to the back of your knee. A seat depth a few centimetres shorter than that lets you sit back with your feet on the floor. A deeper seat is still comfortable if you are happy to use a cushion behind you or to tuck your feet up.

Do the same for seat height: measure from the floor to the back of your knee with shoes off. A seat within a few centimetres of that number keeps your feet flat and your thighs level.

Seat height decides how easy it is to sit down and stand up, and whether your feet rest flat on the floor. Most sofas sit between 43 and 46 cm. A dining chair is usually around 45 to 48 cm, a useful comparison because almost everyone knows how one feels.

• 40 to 42 cm: low and relaxed, close to a lounge seat. Lovely for lounging and for a low, modern look; harder for anyone who finds getting up an effort.
• 43 to 46 cm: the usual range, comfortable for most people.
• 47 cm and above: the easiest to stand up from, welcome for older relatives and tall people.

Majlis seating in the Gulf has traditionally sat low, and many families enjoy a low seat for long evenings with guests. If grandparents come over often, though, a seat of 45 cm or more with a medium comfort makes standing up much easier.

Every Pufflo sofa comes in Cocoon, very soft so you sink in, or Classic, the medium feel most sofas have so you get up easily, at the same price. That lets you pair the depth you need with the feel you like. See soft or firm sofa for how the two compare.

This is the most common sofa compromise. Choose for the person who sits on it most, then adapt it for the other:

• A deep seat for a tall person works for a shorter partner with a firm cushion behind the back, which brings the usable depth forward by roughly the thickness of the cushion, often 10 to 15 cm.
• A footstool or pouf lets shorter legs rest instead of dangling from a high or deep seat.
• A corner solves it differently: the tall person takes the chaise, the other sits upright on the main seat.

If you need one number for a mixed household, a balanced depth of 57 to 60 cm is the safest single choice. The one-minute sofa finder asks how you like to sit and who sits on the sofa most, then suggests a model, a shape and a fabric.

Yes. A low back, around 70 to 75 cm overall, keeps a room open and looks relaxed, but it supports the lower and middle back rather than the shoulders. A higher back, 80 to 85 cm or more, supports the shoulders and sometimes the head, which helps on long film nights.

Arms change how much seat you get. Wide, rounded arms look generous and are comfortable to lean on, but they take width from the seat. When you compare two sofas of the same overall width, the one with slimmer arms seats more. To check everything against your wall at once, use the Will it fit? tool on each sofa page, or start from how to choose a sofa in the UAE.