Buying a sofa cover should be simple — but the biggest reason covers get returned is a simple one: the wrong size. The good news? You don't need to be a professional upholsterer or own any special tools. With a flexible tape measure and five minutes, you can get a fit that looks almost tailor-made.
Here's exactly how to measure your sofa for a cover, written for UK homes — whether you have a classic 3-seater, an L-shaped corner sofa, a recliner, or a sofa bed.
Why Measuring Correctly Matters
A cover that's too small will stretch, strain the seams and pop off the corners. A cover that's too big will bunch, wrinkle and slide around every time someone sits down. Accurate measurements stop both problems — and make your cover look like a custom slipcover, not a baggy throw.
What You'll Need
- A flexible fabric tape measure (the sewing kind, not a metal ruler)
- A notepad or your phone for notes
- Two minutes — plus a second pair of hands if you have a large sofa
Step 1: Measure the Total Width (Most Important)
Run the tape measure horizontally across the front of the sofa, from the outer edge of one armrest to the outer edge of the other. This single measurement decides your cover size, so don't guess it — and never measure only the seating area between the arms.
UK reference sizes: a typical 2-seater is 130–150 cm wide, a 3-seater 180–210 cm, and a 4-seater 210–240 cm. Check these against our size chart before ordering.
Step 2: Measure the Total Depth
Measure from the very front edge of the sofa frame (at the base) straight back to the rear of the backrest. Include the seat cushions in this measurement — the cover needs to drape over the full depth.
Step 3: Measure the Total Height
From the floor, measure straight up to the highest point of the backrest. This stops the cover being too short or riding up. If your sofa has a tall back, look for covers marked "high back".
Step 4: Armrest Height and Width
For full coverage, measure from the floor to the top of each armrest, and across the widest point of the armrest top. Armrests matter for wing chairs, tub chairs and sofas with chunky scroll arms.
Measuring an L-Shaped or Corner Sofa
Treat the sofa as two separate sections. Label the long section A and the short return B, then measure each section's length, depth and height individually. For most L-shapes you'll want a two-piece cover set designed for corner sofas — a single straight cover simply won't stay put around the bend.
Measuring a Recliner or Sofa Bed
- Recliners: measure the back, seat and arms separately, and pick covers sold in multiple pieces. Leave a little slack so the cover doesn't fight the recline mechanism.
- Sofa beds: measure both the folded and extended sizes; decide which state the cover must fit and size accordingly.
Between Two Sizes? Always Size Up
If your sofa sits between two sizes on the chart, choose the larger one. Extra fabric can be tucked neatly into the seams for a snug fit; a cover that's too small will stretch, rip or slip off. This one rule saves more returns than anything else.
Common Measuring Mistakes to Avoid
- Measuring only the seating width — always go armrest to armrest
- Measuring around cushions or curves instead of in straight lines
- Guessing dimensions ("it looks like a 3-seater") instead of using a tape
- Forgetting armrest height on high-back or wing chairs
Find Your Perfect Fit at SofaCoverUK
Once you have your measurements, browse our stretch sofa covers for 1–4 seater sofas, our corner sofa covers for L-shaped layouts, and our recliner covers designed to stay in place. Every listing includes a full size chart, and our customer service team is happy to double-check your measurements before you order.
FAQs
Q: What size sofa cover do I need for a 3-seater sofa?
A: Measure the total width — most UK 3-seaters are 180–210 cm. Always compare against the product size chart rather than assuming.
Q: Will a stretch sofa cover fit my corner sofa?
A: Stretch covers fit standard sofas best. For L-shaped or corner sofas, choose a cover specifically designed for corner layouts, or buy separate pieces per section.
Q: Should I measure with the cushions on or off?
A: With cushions on, in their normal position — you want the cover to fit the sofa as it's actually used.
Q: What if my sofa is between sizes?
A: Always size up. A slightly larger cover tucks in for a clean fit; a smaller one will strain and slip.
