Choosing the right armchair size is about more than finding a design you like. The chair needs to suit your room, support a comfortable sitting position and fit through every doorway, hallway and turn on the way in. This practical armchair size guide explains which measurements to check before you buy.
Why armchair size matters
An armchair can look perfectly proportioned online yet feel too large in a compact room or difficult to move once it arrives. Checking the dimensions in advance helps you assess how much floor space the chair will occupy, how easily people can move around it and whether it can be delivered to its intended position.
Size also affects how the chair feels when you sit down. The overall width, seat height, seat depth and arm height each contribute to the fit, so it is best to consider them together rather than relying on one measurement.
Start with the available space
Measure the area where you plan to place the armchair, then note the maximum width and depth that will work comfortably. Leave enough room for nearby furniture, walkways, doors and practical movement around the chair.
- Measure the width of the available space from side to side.
- Measure the depth from the front of the proposed position to the wall or furniture behind it.
- Check the height of windows, shelves, radiators or artwork that may affect where the chair can sit.
- Consider whether the chair will be positioned beside a coffee table, footstool or another seat.
Use masking tape or sheets of paper to mark the chair’s approximate footprint on the floor. This gives you a useful visual check before you order and makes it easier to judge whether the proportions feel balanced.
Understand the key armchair measurements
Overall width
Overall width is the measurement from the outside of one arm to the outside of the other. It tells you how much horizontal space the armchair will take up and whether it will sit comfortably alongside other furniture.
Remember to account for skirting boards, side tables and the space needed to walk past. A chair may technically fit within a gap but still make the room feel cramped if there is no comfortable clearance around it.
Overall depth
Overall depth runs from the front edge of the chair to its furthest point at the back. It is particularly important in smaller living rooms, bedrooms and home offices where furniture can project into a walkway.
Measure from the wall or furniture behind the chair to the point where the front of the seat will reach. If you intend to recline, add a footstool or place a table in front, assess the complete arrangement rather than the chair alone.
Overall height
Overall height is useful when checking the chair against windows, shelving, panelling and other visual features. It can also help you decide whether the chair will look appropriately scaled next to a sofa or other seating.
Seat height
Seat height is measured from the floor to the top of the seat. A suitable height allows you to sit down and stand up without feeling that the chair is unusually low or high for you.
Think about your own leg length and how you prefer to sit. If you regularly use a footstool, compare its height with the chair so that your legs can rest comfortably without the arrangement feeling awkward.
Seat depth
Seat depth is the distance from the front of the seat to the back cushion or backrest. A deeper seat may suit people who like to relax, while a shallower seat can make it easier to sit upright with your feet firmly on the floor.
To check the likely fit, measure a chair you already find comfortable. Compare its usable seat depth with the product dimensions, bearing in mind that cushions and upholstery can affect the space available to sit.
Seat width
Seat width refers to the usable space between the arms. It is different from overall width and helps you assess how much room you will have once seated.
Consider how you usually sit and whether you want room for a cushion, a pet or a relaxed position. Always compare the internal seat width with the external dimensions before making a decision.
Arm height
Arm height can influence both comfort and the chair’s appearance. Measure from the floor to the highest point of the arms, and compare this with nearby surfaces such as a desk or side table.
For a more personal check, measure the height of the arms on a chair you use comfortably. This can help you judge whether the new armchair will provide a familiar place to rest your arms.
Check the chair’s proportions
Two armchairs with similar overall dimensions can feel very different because of their proportions. Broad arms may reduce the usable seat width, while generous back cushions may reduce the usable seat depth. A taller back can also create a stronger visual presence in the room.
Look at the complete set of measurements rather than focusing on width alone. If you are comparing options, write down the overall width, overall depth, overall height, seat width, seat height, seat depth and arm height in one place.
For a design-led option, you could compare your measurements with the Marlow accent chair and assess whether its listed dimensions suit your room and seating preferences.
Measure the route into your home
A chair can fit in its final position but still be difficult to bring indoors. Before ordering, measure the full route from the entrance to the room where it will be used.
- Measure the width and height of the main entrance.
- Check internal doorways, narrow halls and any restricted openings.
- Measure the width of staircases and note the position of handrails or banisters.
- Check lift dimensions if the chair will be delivered to a flat or upper floor.
- Assess tight corners and turns, including the space above or beside the chair as it is moved.
- Confirm whether doors can open fully and whether temporary removal of a door would be needed.
Compare the delivery route with the packaged and assembled dimensions where these are provided. If packaging measurements are not listed, contact the retailer before ordering rather than assuming the chair will pass through.
Choose a size that suits the room
For compact rooms
In a smaller room, prioritise a footprint that leaves clear walking routes and does not block windows, doors or storage. A chair with a visually lighter profile may also feel less imposing, but always confirm its actual dimensions first.
For larger rooms
A larger room can accommodate a more substantial chair, but the seat should still relate to the other furniture. Use a rug, side table or floor lamp to create a connected seating area instead of allowing the armchair to feel isolated.
For bedrooms and home offices
Measure carefully around desks, wardrobes, drawers and opening doors. In these spaces, the depth of the chair and the clearance in front of it can be just as important as its width.
A simple armchair sizing checklist
- Measure the available width and depth in the room.
- Check the chair’s overall width, depth and height.
- Compare seat height and depth with a chair you already find comfortable.
- Check the usable seat width between the arms.
- Review the arm height in relation to tables and desks.
- Mark the footprint on the floor before ordering.
- Measure every doorway, corridor, staircase and lift on the delivery route.
- Confirm packaged dimensions or ask the retailer if they are not available.
Final thoughts
The right armchair size balances comfort, proportion and practicality. Take measurements in the room, compare the complete specification and check the route into your home before you buy. A few minutes with a tape measure can help you choose a chair that fits both your space and the way you want to use it.