One top brand that manufactures this accessory is Knit Pro, and this particular manufacturer supplies it chart keeper to retailers around the world, making it easy to get hold of. Knit Pro also has a number of other accessories that knitters might find useful, ranging from sock blockers to needle sizer.
Color Outside the Lines: I remember coloring books, and how careful I was to never get the crayon color outside the area I was coloring in or it would be ruined. Not so with knitting. Especially with scarf knitting. Because of all of the yarn choices we have, putting together beautifully color-crafted scarves is so easy. And so fun.
Bliss also use Knitted breasts. The knitted breasts allow nurses to easily demonstrate to women important massage techniques that let them stimulate their milk production and express their valuable first drops of milk. They are particularly helpful when there are language barriers. Woollen breasts are a brilliant free alternative to expensive teaching aids that are used by health professionals to educate new mothers to express by hand before going on to use an electric pump.
Yarn: Premature babies have very delicate skin and can often be allergic to wool; therefore it is best to steer clear of garments made with a wool mix. Acrylic yarn is more appropriate when knitting for preemies. Ideal yarn to use for preemie knits is baby double knit or 4ply yarn. Most preemie patterns will use these.
The blocking mat is another accessory that can be extremely helpful for the knitter or crocheter, or even for those who enjoy sewing and quilting. This mat serves for pinning the project to its surface, making it very easy to line up the project, keeping straight edges, hems and seams.