BoJo,
The curling iron caddy I make is about 5 1/2" wide and 10" long when finished. I layer fabric, filler (which is anything from Warm & Natural to old towels and blankets)and then the silver ironing board fabric. On one side I put another piece of fabric about half way up for a pocket (for the cord, combs, etc.
It's curved at the bottom and straight across the top. I fold over the fabric on top and stitch and then zigzig or finish the layers together. After that I simply stitch all the way around both sides, except for the top, and turn.
You can put a hot curling iron, brush or flat iron in them without worrying about the heat. Great when you are traveling and need to pack right after using it.
I hope this helps. My camera is out of commission right now so can't send a photo. Look on-line and you'll see pictures of them in various sizes and shapes. I just chose what was easy to make and yet functionable.
Judy