4. FABRIC TOP
The following are my measurements for my stool, but I included them in case you wanted them as a guide for your own.
My stool was 10.75" square on all sides. So the bottom of my fabric cover needed to be 10.75" on each side. I decided that the top of the corner needed to be 3/4" less than the base.
So the top of the cushion would end up being 10" square, and the base would wrap around the wood at 10.75" square.
To measure this on my fabric scrap, I folded it in fourths (shown in red), giving me the center point as a reference. So I first measured 5" out from the center to mark the top square that is 10" on each side.
Then from the quarter fold at the edges, I measured the 5 3/8". The finished edge is 10.75, so half of that is 5 3/8".
So when you mark each corner, it is actually a slight curve, (shown in blue)
So with right sides together, you sew the curve on each corner. It's a slight curve, the top only 3/8" smaller than the base. The difference from the 10" top of the cushion to the 10.75" base of cushion is the 3/4", so the curve is half that measurement, 3/8" difference.
Once your corners are sewn, you'll have a cushion cover with the corners poking out.
To help the cover fit snug, I serged the ears of the corners off. You could zig-zag and then trim, or just trim as it will be hidden and not fray.
5. FINISH FABRIC COVER
Stretch your fabric cushion cover over the stool, lining up the corner seams and making sure it has a tight fit.
Then you just staple the fabric around and to the bottom of the stool.
**Make sure you pull the fabric tight enough the corners round nicely around the foam/batting**
I started on one corner, then pulled the fabric tight and stapled the opposite corner. Then did the other corners opposite each other. Then I just had to staple in between the corners around the edges.
Just a quick project, a good beginner project if you're new to upholstery.
I've been trying it out, and what started just as a decorative piece, has turned into a really useful footrest. It's a much better height then before when I'd put my feet up on the coffee table. It's padded too.