What Size Staples for Reupholstering Dining Chairs?

For most dining chair reupholstery, use staples between 8mm and 10mm in length with a narrow crown of around 10mm to 11mm. An 8mm staple suits lightweight fabrics on thin plywood bases. A 10mm staple is the general purpose choice for medium weight upholstery fabric or faux leather on solid timber frames. Step up to 12mm or 14mm only when you are fixing webbing, thick hide, or working into softwood that needs deeper purchase.

Getting this wrong causes two predictable problems. Staples that are too short pull out under tension within weeks. Staples that are too long fail to seat flush, split thin bases, or punch straight through the timber and emerge on the visible face.

Understanding Staple Dimensions

Upholstery staples are described by two measurements, and most confusion comes from mixing them up.

The leg length is the depth the staple penetrates into the timber. This is the figure quoted as 6mm, 8mm, 10mm and so on. It is the number that matters most for holding power.

The crown width is the distance across the bridge that sits on top of the fabric. Upholstery staples typically use a narrow crown of 10mm to 11.5mm. A narrow crown concentrates its grip on a small area, which is what you want when working around curves and folds, because a wide crown will not sit flat on a curved surface.

Most staple guns take a specific staple type, so check what your gun accepts before buying. Type 53 and type 71 are the two most common upholstery ranges available in the UK. Type 71 staples have a slightly finer gauge wire and a chisel point, which makes them the better choice for hardwood frames because they penetrate cleanly rather than bending.

Matching Staple Length To The Job

Different parts of a dining chair rebuild need different fixings.

For thin cotton or linen upholstery fabric over a plywood seat base of around 9mm thickness, 6mm to 8mm staples are correct. Anything longer risks breaking through the underside of the board.

For medium weight upholstery fabric, chenille or boucle on a solid timber frame, 8mm to 10mm is the reliable range. This covers the majority of dining chair recovers.

For faux leather, 10mm is generally the right call. Faux leather sits under real tension at the folds and a shorter staple will gradually work loose along the corners.

For genuine leather or thick hide, use 10mm to 12mm. Leather is thick enough that a shorter staple loses much of its length simply passing through the material before it reaches timber.

For elasticated or jute webbing, 12mm to 14mm is appropriate. Webbing carries the entire seated load and pulls constantly against its fixings, so it needs the deepest bite you can safely achieve in the frame.

For a hessian or calico base layer, 8mm is sufficient, since these layers are held in place by everything fitted above them.

Reading Your Chair Frame

The timber determines what the frame will accept, and it varies more than people expect.

Beech and oak frames are dense. They hold staples firmly, but a blunt or thick gauge staple will bend rather than penetrate. Use fine gauge chisel point staples and, if you are using a manual gun, expect to need real force.

Pine and other softwood frames accept staples easily but hold them less securely, so lean towards the longer end of your range.

Plywood bases need care. Measure the board thickness first. Your staple should be shorter than the board is thick, otherwise the points will emerge on the other side.

Particle board and MDF hold staples poorly because there is no grain for the legs to grip. If your chair has a composite base that is already crumbling around the old staple holes, consider cutting a replacement base from 9mm plywood. It is a quick job and gives a far better foundation.

Manual, Electric Or Pneumatic

The gun matters as much as the staple.

A manual staple gun is inexpensive and adequate for one or two chairs. It struggles with hardwood frames and it tires your hand quickly, which leads to inconsistent tension across a seat because you unconsciously ease off as you go.

An electric staple gun handles a full set of six chairs comfortably and drives staples consistently into most timber. For occasional home upholstery, this is the sensible choice.

A pneumatic stapler is what professional upholsterers use. It is fast, precise and effortless, but it requires a compressor, which is difficult to justify for a single project.

Whatever you use, test on a scrap of the same timber first. Fire a few staples and check they sit flush. If the crown stands proud, your staple is too long for that timber or the gun lacks power. If it sinks below the surface and tears the fabric, it is going in too hard and you should reduce the depth setting if your gun has one.

Spacing And Placement

Length is only half the equation. Where you put the staples decides whether the cover holds its shape.

Space staples every three to four centimetres along straight runs. Tighten that to every two centimetres around curves and corners, where tension concentrates.

Angle staples so the crown runs at a slight angle to the timber grain rather than parallel with it. A staple driven along the grain line can split the timber. Set at an angle, each leg engages separate fibres and grips considerably better.

Keep staples at least a centimetre in from the edge of the frame or board. Too close to an edge and the timber will split away under load.

Work from the centre of each side outwards, alternating between opposite sides. This distributes tension evenly and stops the cover creeping out of alignment.

Removing Old Staples Properly

Before you fit anything new, the old fixings must come out cleanly.

Use a proper staple lifter rather than a screwdriver where you can. The forked tip slides beneath the crown and levers the staple up without gouging the timber.

If a staple breaks and leaves one leg buried, grip it with fine nosed pliers and twist rather than pull. Twisting works the leg loose along its own hole. Pulling straight often shears it off flush with the surface, leaving a fragment that will deflect any new staple driven near it.

Fill badly damaged areas with wood filler and let it cure fully before restapling. Filler will not hold a staple well, so position new fixings in sound timber wherever possible.

Safety Points Worth Observing

Staple guns fire fragments when a staple strikes something hard beneath the surface, such as an old buried tack. Wear eye protection throughout.

Keep your free hand well away from the staple line. It is easy to hold fabric taut with your fingers directly in front of the gun without thinking about it.

Discarded staples are extraordinarily good at finding bare feet. Sweep as you go rather than at the end.

When The Frame Says Stop

Sometimes the answer is that no staple size will work. If the seat base crumbles under a screwdriver, if the frame has been stapled and restapled until the timber is perforated, or if the joints move when you handle the chair, you are fixing the wrong problem.

In that situation, replacing the chairs is the practical route. Our dining chairs UK sale range covers upholstered, wooden and metal framed designs, and the modern velvet dining chairs UK selection suits anyone wanting to bring texture into a dining room without taking on an upholstery project. You will find the whole collection at Furniture in Fashion, with free delivery to most UK mainland postcodes.

If you are refreshing the whole room, our modern dining table and chairs sets UK take the matching out of your hands entirely.

Frequently Asked Questions

What is the most useful all round staple size for dining chairs?

A 10mm leg length with a narrow crown handles the majority of dining chair upholstery work, from medium weight fabric to faux leather on solid timber frames.

Can I use a regular office stapler for upholstery?

No. Office staplers lack the driving force to penetrate timber and use staples that are far too short to hold under tension.

What staples should I use for chair webbing?

Use 12mm to 14mm staples for webbing. It bears the full seated load and needs the deepest secure fixing the frame will take.

Why do my staples keep bending instead of going in?

Usually because the frame is hardwood and the staples are too thick or lack a chisel point. Switch to a fine gauge chisel point staple, and use a more powerful gun if you are working manually.

Should staples go with or across the timber grain?

Set them at a slight angle to the grain. Driving them parallel with the grain risks splitting the timber and gives a weaker hold.