How to Measure Deep Seating Chair Cushions
Deep seating cushions come as a two-piece set — a separate seat cushion and back cushion. The back cushion sits on top of the seat cushion, which means you must subtract the seat thickness when calculating the back height. You need six measurements across both pieces.
Part A — Seat cushion
Choose the seat cushion thickness
Select a thickness between 2 and 6 inches. Write this number down — you will need it in Step 6 to calculate the correct back cushion height.
Measure the seat width
Measure side to side across the widest point of the seat frame.
Old cushions compress and spread over time. Measuring them produces an oversized order. Always measure the bare wood or metal frame directly.
Measure the seat depth
Measure from the front edge of the seat frame to the back rail. If the frame has a front lip, measure to the inside edge of that lip.
Part B — Back cushion
Choose the back cushion thickness
Select a thickness between 2 and 6 inches. Back cushions are often ordered 1–2 inches thinner than the seat for a more relaxed, reclined feel.
Measure the back width
Measure side to side across the back frame at its widest point. This is usually the same as the seat width, but measure independently to confirm.
Calculate the back cushion height
Because the back cushion rests on top of the seat cushion, it starts higher than the seat frame. If you order the full frame height, the back cushion will sit too high and push the seat cushion forward. You must subtract the seat thickness from the total frame height.
Back height (order) = Total frame height − Seat cushion thickness
Your chair back frame measures 24" tall. You chose a 4" thick seat cushion in Step 1.
24" − 4" = Order a 20" back cushion height.
Measuring tips
The seat thickness from Step 1 is used again in Step 6. Note it before you start measuring the frame so you don't lose track.
A steel retractable tape gives straight, consistent readings. Avoid soft tailor's tape — it sags and causes sizing errors across longer spans.
We produce cushions in ½" increments. Round each measurement to the nearest half-inch before entering dimensions at checkout.
Take each measurement twice and compare. If the readings differ, take a third and use the middle value.
Not sure about the back height calculation?
Email us at support@uscushion.com — we'll work out the numbers with you before you order.
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