Choose a backrest cover by measuring the chair’s backrest width, height, and thickness, then matching those numbers to the seller’s size chart.
Picking the wrong backrest cover usually comes down to one mistake: guessing the size instead of measuring it. A cover that’s too small wrinkles and shifts, while one that’s too long drags on the floor and picks up moisture. The fix for both problems is a tape measure and about five minutes of your time.
The Three Measurements That Matter Most
Backrest covers fit properly when you know three dimensions of the chair’s back panel: its width, its height, and its thickness or depth. These three numbers map directly to the size charts on nearly every product listing, so capturing them accurately solves most fit problems before they start.
Here’s what to measure:
- Backrest width: measure across the widest point of the back panel, from left edge to right edge.
- Backrest height: measure from the top of the back panel down to the seat base, following the contour of the frame.
- Backrest thickness: measure the depth of the padding or frame at its thickest point.
One sizing guide lists “standard chair cover” backrest dimensions of 35 to 48 cm wide, 42 to 58 cm high, and 1 to 7 cm thick, with “large size chair cover” backrests running 35 to 43 cm wide, 55 to 68 cm high, and 5 to 10 cm thick. If you’re between sizes, sources recommend sizing up slightly rather than forcing a tight fit.
Which Chair Measurements Confirm Compatibility?
Beyond the backrest itself, several guides also check the overall back height, seat width, seat depth, and sometimes arm height to confirm a cover will fit. The reason is simple: a cover has to reach across the seat junction, not just drape over the back panel.
SureFit’s measuring guide uses one-piece stretch chair slipcovers sized 32 to 40 inches wide and 40 inches maximum height, and another at 32 to 43 inches wide and 40 inches maximum height. Those ranges cover both the backrest and the seat in a single piece, which is why the seat width and depth matter just as much as the back dimensions.
How to Install a Backrest Cover So It Stays Put
Installation is straightforward, but the order matters. Seller guidance suggests putting the cover over the top of the backrest first, then smoothing it down over the front face. Secure it with the Velcro, ties, or elastic straps if the cover includes them, then tuck any excess fabric at the sides and adjust until the cover follows the chair’s contours.
Two mistakes cause most reinstallation headaches. First, measuring only the outside full chair height can miss the actual back panel fit; the “inside back” measurement across the front face of the backrest is the dimension that determines slipcover fit across the seat junction. Second, choosing by seat size alone fails because compatibility depends on both seat width and backrest dimensions working together.
Also check the chair style before ordering. Some covers are made for specific chair types such as dining chairs, office task chairs, Parsons chairs, folding chairs, or accent chairs, so the product category and size chart must match your chair.
Once you have your measurements, our tested roundup of the best backrest covers compares top picks by size range and chair compatibility, so you can buy with confidence.
Backrest Cover Sizing at a Glance
The table below summarizes the key measurements and the common pitfalls tied to each dimension.
| Measurement | Where to Measure | Common Mistake |
|---|---|---|
| Backrest width | Widest point of the back panel | Measuring only the seat, not the back |
| Backrest height | Top of back panel down to seat base | Using full chair height instead |
| Backrest thickness | Thickest part of the padding or frame | Assuming all covers fit thick padding |
| Seat width & depth | Across and front-to-back of the seat | Choosing by seat size alone |
| Arm height | Seat base to armrest top | Skipping this for armchair covers |
A cover that’s slightly wider and deeper than the chair usually fits best, but it should be slightly shorter than the furniture’s overall height so it doesn’t drag on the floor. A too-tight cover can wrinkle, shift, or fail to cover properly, while an overly long one collects dust and moisture at the floor line.
For most chairs, the reliable path is measuring the backrest at its widest point, its height, and its thickness, then comparing those numbers against the seller’s size chart. Check the chair style matches the product category, order the next size up if you’re between sizes, and install top-first with the straps or elastic secured before tucking the edges. SureFit’s measuring guide offers a useful visual walkthrough of these same steps if you want extra confirmation before ordering.
FAQs
What if my chair is between two cover sizes?
Sizing up slightly is the safer choice. A slightly larger cover can be tucked and secured with elastic or straps to fit snugly, while a too-small cover will strain at the seams, wrinkle, and shift out of place during use. The extra fabric hides easily under the seat cushion.
Do I need to measure the seat as well as the backrest?
Yes, for one-piece slipcovers. These covers span the seat junction, so they need the seat width and depth to match alongside the backrest dimensions. Backrest-only covers just need the three back measurements, but measuring the seat confirms the overall chair profile matches the product’s intended style.
Can a backrest cover work on any chair type?
No. Many covers are built for specific chair styles such as dining chairs, office task chairs, Parsons chairs, folding chairs, or accent chairs. A cover designed for a Parsons chair’s tall, straight back may not fit a low, curved accent chair, even if the width measurements happen to match.
References & Sources
- SureFit. “Measuring Guide.” Provides one-piece stretch slipcover size ranges and measurement instructions.