How to choose a sofa: the seat depth, the cushions and the room

Separate the sofa’s footprint from the space you sit in

Overall depth and inner seat depth are different measurements. Costco defines the latter by the distance from the front of the seat to the back cushion. The distinction matters when a large-looking sofa devotes much of its footprint to a substantial back or arms. Compare the manufacturer’s full dimensional drawing, then inspect the space available for your actual sitting style. A room plan tells you whether the furniture fits; it does not finish the comfort decision. ^[2]

Make a household shortlist of uses before choosing a silhouette: sitting upright for conversation, stretching out, reading with your legs tucked up, or accommodating visitors. IKEA’s buying guide encourages considering how a sofa will be used. Our suggestion is to test those uses on a realistic configuration rather than choosing from a staged image. If the household has conflicting preferences, compare separate seats or different cushion arrangements instead of presuming everyone should adapt to one very deep design. ^[1]

Seat height and back cushions change the experience

Try sitting down, settling back and standing again. Costco’s guide discusses seat height as a functional comfort consideration and distinguishes internal seating space from overall dimensions. Treat its guidance as a starting point, not a formula predicting personal comfort. Ask whether the listed height is a general product measurement and inspect what happens when the actual cushions are in place. Do the shorter and taller people in your household reach a position they would willingly use? ^[2]

Back cushions and the way you arrange them can change how a sofa feels to you, so assess the finished combination rather than its frame in isolation. IKEA’s range describes different seats as structured, generous or lounge-like; those are product descriptions rather than standardized comfort scores. Ask to see the exact cover, cushion package and configuration you will receive. If you only test a differently equipped display model, record that limitation before deciding that the result will transfer. ^[4]

Ask for construction details instead of a single quality label

Our suggested construction checklist asks the retailer to identify the frame, suspension, seat filling, cover system and parts that can be replaced. Ask which cushions are fixed or loose, whether replacement inserts are available, and what care the filling requires. These are verification questions, not claims that one named material always lasts longer. IKEA presents several sofa series with different modular and cover arrangements, illustrating why the complete specification is more informative than a broad category label. ^[4]

If you want motion, distinguish the type of mechanism and how you access its controls. La-Z-Boy UK explains that static, powered and manual reclining designs place different demands on space and operation. We would compare those practical requirements before assigning value to extra functions. Stressless also offers different motion systems in its sofa range; their presence describes functionality, not proof of superior comfort or measured long-term durability. ^[3][5]

Choose upholstery around the care you will actually perform

Do not turn a general material preference into an assumption about cleaning. IKEA’s sofa directory identifies removable or washable covers on some particular series. That does not establish that every fabric sofa, every component or every cover variant can go into a washing machine. Ask for the exact product’s care label and instructions, including whether the seat, back and frame covers have different requirements. Confirm replacement availability separately from the fact that a cover can be removed. ^[4]

Our practical approach is to describe the likely messes and maintenance constraints first: food, muddy paws, direct sun, occasional guests or a busy shared room. Then ask the seller how the specific upholstery should be maintained and what the warranty actually covers. IKEA’s buying guide treats material and everyday use as part of choosing a sofa. A surface that photographs beautifully but requires care you will not perform is a poor match for your routine, whatever the marketing description says. ^[1]

Plan the room in both its resting and working layouts

Mark the proposed footprint on the floor and walk through the room as you normally use it. Consider doors, tables, storage access and the routes other people need. For a sectional, check the exact orientation and complete configuration, not only one module. Costco’s measuring guide covers layout planning and delivery preparation; its useful lesson is to treat placement as a real set of dimensions rather than trusting how spacious a product image looks. ^[2]

A reclining or adjustable sofa needs an additional check: its space and accessibility when in use. La-Z-Boy UK advises allowing room for reclining and reaching the relevant controls, and notes that powered models need a socket. Stressless describes both motorized and other moving systems. Ask for the operating-clearance drawing for your selected model; do not assume that every motion sofa needs the same space or that a static footprint describes the expanded arrangement. ^[3][5]

Make delivery and aftercare part of the selection

Measure the full route from outside to the final room. Costco specifically includes entrances, hallways, stairs and lift access in its delivery guidance. Discuss the packaged dimensions and any manufacturer-approved removable parts with the delivery provider. Our recommendation is to resolve unclear turns or access limits before payment. A sofa that fits your floor plan is still an unsuitable purchase if the agreed delivery service cannot bring that configuration into the room. ^[2]

Before ordering, request the current local terms for changes, failed delivery, returns, defects and replacement parts. For modular or powered designs, record the precise layout and controls you selected. IKEA and Stressless show how varied configurations can be within a range; a shared brand or series name alone may not identify the exact sofa on the order. Keep the product drawing and written specification with the invoice so you have a clear basis for checking what arrives. ^[4][5]

Compare the tradeoffs

Frequently asked questions