We recently upgraded our queen size mattress to a king size mattress by way of getting two twin XL mattresses and shoving them together to make a king size mattress. I needed to make new bedding!!
Supplies
The sizing is for twin XL mattresses measuring 39- x 80-inches.
- 3 yards of ½-inch braided elastic
- 4 yards of 113-inches wide organic cotton sateen from Organic Cotton Plus
Before you begin PREWASH YOUR FABRIC!!!
Cut Fabric
Cut two pieces of fabric each 71 inches x WOD (width of fabric). The bedding will be turned 90º from what you would expect. The top and bottom go from selvage edge to selvage edge.
Fitted Sheet
Cut out your corners, 15-inch square.
Your fabric should still be 71 inches wide.
And ~112 inches long.
Using the french seam method, sew the corners together. Pin wrong sides together and sew together with a ⅜ inch seam allowance. Trim the seam allowance down to ⅛ inch. Fold the fabric along the seam, right sides together. Stitch along the edge with a ⅝ inch seam allowance.
Attach the elastic to the bottom raw edge on the wrong side of the fabric. I used my Babylock serger with the elastic foot:
You could also just use a zigzag stitch and stretch your elastic as you sew. You can follow this tutorial on Indie Sew. I didn’t measure how much elastic I used. It is your preference as to how much stretchiness you want.
Once your elastic is attached to the wrong side, fold the elastic over and stitch down. Keep the elastic taut and carefully and consistently feed it through your sewing machine. I set my presser foot pressure at maximum and used a straight stitch with a stitch length between 3 and 4. Fitted sheet is done!
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