The charities have a lot of information on their websites, below is some general advice to help you get those needles clicking.
Bliss: One of the many ways that you can support Bliss is by knitting for babies in special care units. Knitted items are most helpful for babies about to go home, but there is also a need for blankets and hats for babies in hospital. Knitted items are often not suitable for intensive care units – stitched cotton is preferable. However for larger babies, and in high dependency and special care units, knitted items are often very welcome.
It may take time out of your schedule but there are many benefits to teaching and allowing your children to join you in your favorite hobby.
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.
Size: Don’t put too much importance on trying to perfect the size of a preemie item of clothing. There is a great difference between premature baby sizes and so an item of any size should be suitable for at least one baby. As a general guide premature babies head circumference is roughly the same as their chest circumference. The average premature babies chest measurements are 8”-14”. However clothes of all sizes are needed for preemies, so no matter how big or small your item is it will most likely fit at least one baby.