Question: How To Sew A Corner On A Cushion?

How to Sew Boxed Corners

The boxed corner seam turns a flat piece of fabric into a three-dimensional object that can be used to make cushions, tables, and other items. I’m no expert sewer, but mastering these basic techniques has allowed me to create unique and perfectly-tailored items.

Measuring and Cutting Your Fabric for a Boxed Seam

If you want to make a tailored table cloth, ottoman slipcover, or even a stool cover, you’ll need to measure the item you’re covering. A note here on letter C u2013 the amount needed for hem and/or seam allowance. Once you have your measurements, cut the fabric down using a rotary cutter and ruler.

How to Sew Boxed Corners – Method 1 (The Really Easy Way)

If your fabric frays or you want to keep the edges from rolling, use a wide zig-zag stitch or a serger to sew the two edges together using a 1/2u2033 seam allowance. If your fabric frays or you want to keep the edges from rolling, use a wide zig-zag stitch or a serger.

How to Sew Boxed Corners – Method 2 (French Seams)

This method involves sewing the WRONG sides of your fabric together and pressing it flat with a hot iron. Then sew the seam again, this time with the RIGHT sides together.

How do you sew a corner on fabric?


  1. Unfold the second fold so that only the raw edge seam allowance is folded over.
  2. Draw a diagonal line in fabric marker connecting the two marks.

How do you upholster the corners of a seat?

Pull the “Y” flap straight over the corner and staple it securely. Pull each edge of fabric on each side of the corner straight over the seat cushion and staple each to the backside of the cushion. Repeat with each corner.

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Contents Table of Contents

  1. Step 1: Cut and Iron. Step 2: Fold the Corners. Step 3: Fold and Press the Other Sides. Step 4: Fold Again. Step 5: Sew Hem.

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