You can over look these rules if you are buying a small bag to carry knitting material for smaller projects. While buying a small bag always look for a bag that has soft sides, so that you can fit extra material without harming it. A drawstring and a short strap make it easier to wrap the bag around your wrist. If you carry bigger bags then it is possible that the small items get misplaced in your bag.
It is not necessary to buy a knitting bag, if you are enthusiasts enough then you can make one for yourselves. You can knit a bag or make it out of fabric in any case there are a lot of patterns to choose from. You can use any type of fabric or material to make a bag that pleases you and carries your load.
As you are aware of your needs, you know how to keep yourselves organized. Hence you can go for a tote bag which is simple and without interior pockets. A bag containing a series of pouches and slots is also a better option to store small needles and supplies in an orderly manner.
A knitting bag not only makes you mobile, but provides an opportunity to show case your talents. Whenever you sit in a garden, and people ask you about your knitting talents, you can easily teach them a stitch or two by carrying an extra needles and yarns in your knitting bag.