Bench Cushion Measurements: Sizes, Thickness and Fit for Any Bench

Benches are the most varied cushion we cut. In one week the cutting floor might see a 36″ entryway bench, a 48″ porch glider, a 60″ dining bench and a 78″ outdoor teak bench — same category, completely different rules. A dining chair is a dining chair everywhere; a bench is whatever its builder decided.

The measurement is simple (one rectangle, usually), but a handful of decisions around it — between-slats fit versus overhang, thickness by use, ties — are what separate a bench cushion that looks built-in from one that slides around and frays on the edges. Here is the full protocol, with real dimensions from benches we replace cushions for. For the general width/depth/thickness method, start with how to measure outdoor cushions; the scenario pages for indoor builds are custom indoor bench cushions and custom banquette cushions, and for outdoor benches custom outdoor bench cushions is the preset starting point.

Step 1: Decide the Fit Style Before You Measure

Two ways a bench cushion can sit, and they change the numbers:

• – Inside fit — the cushion sits between the bench’s arms, end panels or slat frames. Measure the clear opening and order to it. Looks tailored, stays put.
• – Overhang fit — the cushion runs the full length of the bench top, past the arms. Measure the full deck plus the overhang you want (typically 1″–2″ past each end, or none if the bench ends are square).

Write down which one you are doing before recording numbers — our order desk sees “48 inches” far more often than “48 inches between arms” or “48 inches including overhang,” and the two orders are different cushions.

Step 2: Measure Length

1. Inside fit: measure the clear opening at the front edge and again at the back. If they differ, use the smaller.
2. Overhang fit: measure the full deck length, then decide the overhang and add it deliberately — do not just round the deck measurement up “for luck.”
3. Long benches: measure at three points (both ends and the middle). Bench tops, especially wood and composite, bow. A cushion cut dead straight on a crowned deck rocks; if your middle reading is more than 1/4″ proud of the ends, note it — the foam can be thickness-split to compensate, or you accept a slightly firmer center sit.

Step 3: Measure Depth

Front to back, on the flat of the seat:

• – Do not include the backrest or any lip below the deck.
• – Standard bench depths run 14″ (entryway/window benches) to 24″ (deep outdoor dining benches). Patio gliders typically run 21″–22″.

Typical pairings we cut: a 36 × 16 entryway cushion at 3″, a 48 × 21.5 glider cushion at 5″ (the exact Edington glider bench spec — one piece, 48 × 21.5 × 5), and 60–78″ outdoor benches at 4″–5″ depending on frame.

Step 4: Choose Thickness by What the Bench Is For

Thickness is a use decision, not just a comfort dial:

Two factory notes. First, on benches over about 60″, a single 3″ layer of standard foam will feel great for a season and then dish in the two spots people always sit. Either go 4″+ or upgrade density — the density grades are explained in memory foam vs foam cushions. Second, density options are priced live in the builder, and a bench is mostly area, so thickness is the biggest price lever you control. The custom cushions builder prices it live.

Step 5: Radius Ends and Special Shapes

• – Rounded front corners: measure the radius with the card method (slide a card into the corner; distance to first contact with the curve). Very common on wooden benches with bull-nosed edging.
• – Fully rounded ends (oval/ovalized benches): trace a template. Numbers cannot describe a curve, but paper can.
• – Bowed fronts: same — template. Bowed shapes are priced by their footprint — depth plus two-thirds of the bow height — the curved seams are a cutting detail, not a surcharge line.
• – Slat gaps: if the bench deck has open slats wider than about 1/4″, note it. We cut bench cushions with a thin firm base layer over slatted decks so the cushion does not stripes-press into the foam over time.

Step 6: Ties, Non-Slip and Outdoor Details

• – Ties: the market standard is a pair at each corner. On benches longer than 48″, add a mid-edge pair — two ties across five feet of bench cannot stop center lift in a breeze.
• – Non-slip underlay: the indoor alternative; most porch benches do better with after-market ties plus a cut-to-size rug pad.
• – Outdoor fabric: uncovered benches live in UV and rain; solution-dyed acrylic is the only construction we recommend for full exposure — see best outdoor cushion fabric for the comparison.
• – Drainage: cushions on slatted outdoor benches should use open-cell foam wrapped in a breathable cover so they dry; fully sealed vinyl covers trap water against the slats and rot the bench under them. More on water behavior in waterproof cushions explained.

Real Bench Dimensions from Our Pattern Library

The Edington pattern ships ready-to-order from the Hampton Bay Edington page if you would rather skip measuring entirely — glider cushions are one of our most-ordered stock patterns.

Bench Cushion Cheat Sheet

Measurement	What to record	Typical range
Length (inside fit)	Clear opening, front + back	36″–78″
Length (overhang fit)	Deck length + deliberate overhang	—
Depth	Flat of the seat, front to back	14″–24″
Thickness	By use (see table above)	2″–6″
Corner radius	Front corners, card method	1″–6″
Ties	Corner pairs + mid-edge over 48″	2–4 pairs
Deck crown	Three length readings if wood/composite	Note if > 1/4″ bow

Real-World Bench Scenarios

Three situations our order desk handles weekly, worked through:

The porch glider: usually 48″ × ~21″ inside the arms — the Edington glider spec (48 × 21.5 × 5) is the exact pattern, orderable directly from the Edington page without measuring. Five-inch foam with a plush wrap and solution-dyed fabric for all-day exposure; the glider frame takes after-market ties at all four corners.

The indoor entryway bench: 36″ × 16″ × 3″ with the 2″ corner radius recorded, and a cut-to-size rug pad instead of ties. Density still matters — the entry bench is sat on with full weight, coats in hand, dozens of times a day; 35D minimum even though it lives indoors (density logic).

The 78″ outdoor teak dining bench: no stock anything fits properly. Measure the deck, order custom at 4″ (dining height discipline), a waterproof cover over high-density foam for uncovered exposure (water logic). Priced by area at the standard rate — roughly in the chaise band (price guide).

Bench Cushion FAQ Quick-Reference Dimensions

Printable summary of every spec in this guide for the most common bench projects:

FAQs

From Paper Pattern to Finished Depth

Measuring day on a hallway bench: a rolled sheet of brown kraft paper and an L-shaped framing square resting on the bench top. The square keeps your width and depth lines square to the edges; the paper becomes the template the pad is cut from.

At the foot of a bed the same numbers pay off: a thick cream pad on the bench, smooth flat top, white linens behind. The bench reads as part of the bedroom instead of a hard wooden afterthought.

Depth is the dimension people second-guess, so look at it from the side: a sage green pad whose profile rises well above the wooden seat board. That tall side view is what several inches of loft actually looks like in the room.