Let's get right into it...
What you need:
- foam cut to desired mattress size my piece is (20" X 10" X 2.25")
- 1 yd of fabric
- sewing machine (of course)
- thread (haha)
The top piece- 22.5" X 12.5"
and two back pieces- 13" X 12.5"
You want to fold over and hem one 12.5" side of each back piece.
Next lay your top piece right side up. Place your back pieces right side down with hemmed sides over lapping in the center with the outer edges matched up with the edges of the top piece.
Pin. Sew a half inch seam all the way around.
Now this is where we deviate from the typical envelope instructions. You're going to take the corners and pinch them together.
Pin like so two inches from the edge and sew a straight line across the corner as you pinned it.
Its not a true sewing project until a kid gets in the way.
This resulting seam, in the picture below, should be 2.25". Just like the depth of the foam mattress. Clip off the corners and turn your project right side out.
Your corners should now look like this and you are ready to stuff in your foam!
Here it is!
Bottom- (Don't ask me why I did a decorative seam here, it'll never be visible)
There you have it! Three mattresses in 90 minutes.
Have you ever made mattress covers before? Did you use a similar method? I'm curious to hear what works for you!