Syringes are labeled based on how much liquid they can hold. Some syringes measure medication in milliliters (ml), others use cubic centimeters (cc). The good news is, 1 cc is equal to 1 ml, so you don't have to worry about confusing conversions when matching a syringe to your dosage. You just need to make sure you select a syringe that will hold the amount of medication you've been prescribed. It sounds intuitive, but if you aren't used to drawing up injectable medications it's worth pointing out. For example, if you're supposed to give yourself 3 cc of a drug, don't use a syringe that holds only 2 cc.
The next major break-through in needle-making was the arrival of high-quality steel-making technology from China in the tenth century, principally in Spain in the form of the Catalan furnace , which soon extended to produce reasonably high quality steel in significant volumes. This technology later extended to Germany and France, although not significantly in England. England began creating needles in 1639 at Redditch ,  creating the drawn-wire technique still in common use today.  About 1655, needle manufacturers were sufficiently independent to establish a Guild of Needlemakers in London, although Redditch remained the principal place of manufacture.  In Japan, Hari-Kuyo , the Festival of Broken Needles, dates back to the 1600s.