How do you choose a sofa cover by shape? Count the upholstered sections, not the sofa. A straight sofa needs one cover, an L-shape needs two, and a U-shape needs three, because each straight run takes its own stretch cover. Measure every section arm to arm, match each to the closest size, then pick your fabric and colour last.
The easiest way to choose a sofa cover is to stop thinking about the sofa as one complicated shape. Look at how many separate upholstered sections it has. A straight sofa has one section, an L-shape normally has two, and a U-shape has three. Each section takes its own cover.
How many covers do I need? Shape at a glance
| Sofa shape | Sections | Covers to order | How to measure |
|---|---|---|---|
| Straight | 1 | 1 cover | Full width, arm to arm |
| L-shape / corner | 2 | 2 covers | Each section from the corner out |
| U-shape | 3 | 3 covers | Left, centre and right separately |
That gives you the whole rule in one line: straight sofa = one cover, L-shape = two covers, U-shape = three covers. The sections do not need to be the same size. A long three-seat section can sit beside a shorter two-seat return. Measure them independently and select the appropriate size for each.
How to choose a cover for a straight sofa
A straight sofa is the simplest shape to cover because the back and seat run in one continuous line. Order one cover and choose its size from the full measurement across the sofa, from the outside of one arm to the outside of the other.
Do not measure only the sitting area between the arms. The cover has to travel over the arms and around the outer edges, so the complete arm-to-arm width is the useful number. Covaba's current stretch-cover sizes are:
- 1-Seater: 90 to 130 cm
- 2-Seater: 135 to 175 cm
- 3-Seater: 180 to 220 cm
- 4-Seater: 225 to 300 cm
If your measurement sits between two sizes, choose the larger one. A little usable stretch is easier to settle neatly than a cover pulled hard at every seam. Our full size guide shows the measurement points clearly, and what size sofa cover do I need maps every width to a size.
Know your shape and size? Browse Covaba stretch sofa covers →
How to choose covers for an L-shape sofa
An L-shape sofa is two straight sections meeting at one corner. Order two covers. Begin at the corner and measure each section outwards to its outer arm, following the complete upholstered length.
Write the measurements as Section A and Section B. This avoids the common mistake of adding both lengths together and trying to choose one oversized cover. One cover fits Section A; the second fits Section B.
For example, if the main section measures 205 cm and the return measures 160 cm, you would choose one 3-Seater cover and one 2-Seater cover. The colours match; the sizes do not have to. For a step-by-step fit, see our guide on how to fit a stretch sofa cover.
How to choose covers for a U-shape sofa
A U-shape sofa has three sections: a centre section and two returns. Order three covers and measure all three separately. Label the measurements Left, Centre and Right as you go.
Do not assume the two sides are identical. Modular sofas are often asymmetrical, and one return may be longer or deeper than the other. Three quick measurements prevent one section from ending up too tight while another has excess fabric.
When the covers arrive, fit the centre first, then each side. Working from the middle out makes the corner joins easier to align and keeps the fabric balanced.
Shop the best-selling stretch covers
Every Covaba stretch cover comes in all four sizes, so you order one per section and keep the colour consistent across the whole sofa. Tap any cover to choose your size.
For an L- or U-shape, the Smooth Sectional cover in Pearl Grey spans multi-seat frames; for a straight, compact two-seater the Smooth Compact cover in Ink Black keeps the fit tidy.
Measure shape first, then size
The order matters. First count the sections. Then measure each section. Only after that should you choose the size.
- Identify whether the sofa is straight, L-shaped or U-shaped.
- Count the separate sections: one, two or three.
- Measure every section from its outermost edges.
- Match each measurement to the closest cover size.
- Choose the fabric and colour once the fit is settled.
For a complete walkthrough of width, depth, height and arm shape, use our simple sofa measuring guide.
What about sofa beds and unusual shapes?
A sofa bed should be chosen according to the shape it has when closed, but its folding mechanism and split back still matter. Browse our dedicated sofa bed covers, the better starting point for that construction.
Very sculptural arms, fixed tables, recliner mechanisms or sections that cannot be separated may need more careful checking. The dimensions on the product page remain the final reference. If the sofa sits exactly on a boundary, go up rather than forcing the smaller size.
Choose the finish after the fit
Shape and size decide whether the cover works. Texture and colour decide how it changes the room. A smooth plain stretch gives the cleanest, quietest line. Velvet makes colour feel deeper. A woven or patterned surface brings more movement and is naturally more expressive. Start with the practical answer, then make the visual decision.
Frequently asked questions
Do I need one large cover for an L-shaped sofa?
No. An L-shaped sofa uses two covers, one for each straight section. Measure the two sections separately because they may require different sizes.
How many covers does a U-shaped sofa need?
Three. A U-shaped sofa has a centre and two side sections, so each section receives its own cover.
Can the sections use different cover sizes?
Yes. Choose the size that matches each individual section. The colour and fabric can remain consistent while the sizes differ.
What should I do if my sofa is between two sizes?
Choose the larger size. It gives the stretch fabric enough room to follow the sofa without pulling excessively at the seams.
Should I measure the cushions separately?
For a one-piece stretch sofa cover, measure the sofa with its cushions in their normal position. Separate cushion covers are a different product and use their own dimensions.