Trini is a great sized pouch for makeup, jewellery and your crafty bits and bobs. Trini measures 6" x 10" standing. It has very easy appliqué too, without doing free motion. Using my method of using half a zip, you can learn to attach a slider, it's so easy.
 
There is a YouTube tutorial on the half zip pouch with the appliqué, so you can look there for further help if you need it.