You will need:
1/2 yd of fabric (depending on the size of your device)
a second fabric for lining (the size of your device)
1 envelope
button, velcro, etc,.
You need to measure the dimensions of your device and add 1.5". This may sound like a lot but you have to take in consideration seam allowance as well the thickness and you won't want the case to be too snug and have to fight to get it in there.
After you figured out your dimensions use the dissected envelope as your model. You do NOT want to trace it, but simply draw out the base first and then add the flaps and doors.
-Flap 2 will be 2" shorter than the width of your device.
-Flap 1 needs to be 1 3/4" shorter than the width.
-The length of the doors will be equivalent on each side, but they need to be able to reach the middle.
**Be sure to add the corners in the envelope like below. If not then when you fold it up to be an envelope they won't match up correctly. Then cut the pattern out and your fabric.
LINING
The lining needs to be the same length and width as the base of your pattern.
-cut 2
-sew the sides and bottom, leaving
an opening at the top
This needs to be the length of the base and the same dimensions of flap 1.
-sew the bottom of the flap to the other lining
Place the lining on top of your fabric (wrong side facing up) and fold the edges over and sew.
Fold the doors in to the center and sew.
**When sewing be sure not to go all the way through to the back.
Then fold the bottom flap up to the middle and sew again.
Now alls you need is a button or some other way to latch your case!