The corner itself is four movements, and the neatness comes from what you do afterwards.
Sewing it. Sew to exactly the seam allowance from the edge. Stop with the needle down — this is what holds the fabric in place. Lift the presser foot. Pivot the fabric ninety degrees. Lower the foot. Continue.
If your machine has a needle-down setting, use it; if not, turn the handwheel by hand to drop the needle before lifting the foot.
Making it sharp. Before turning the corner right side out, trim across the point close to the stitching — leave about 3 mm. On a very sharp point, also taper the seam allowances on both sides. This removes the bulk that otherwise makes a rounded, stuffed-looking corner.
Turning it. Push the point out from inside with something blunt — a chopstick, a point turner, the closed end of a pair of scissors. Never scissors points or a pin, which push straight through the fabric at the weakest spot.
Press it. Press from the point inwards.
For a stronger corner on something that takes load — a bag, a collar — shorten the stitch length for the last centimetre before the pivot and the first centimetre after it. A denser stitch resists the fraying that corners are prone to.
Questions people actually ask
My corners come out rounded.
Not enough trimmed before turning. The bulk of the seam allowance is filling the point. Trim closer and taper the sides.
I pushed through the corner.
Use something blunt to turn points. It is the commonest way a finished corner is ruined and it happens in the last thirty seconds of the job.
Last reviewed 2026-08-11