Following up on the information about Colonial Needle – a great place to order your embroidery needles – it may be useful to have access to a good reference chart that describes the various needles used in hand embroidery and even gives photos of them (I love photos!).
Country Bumpkin has a really good embroidery needle reference chart on their website. What I like about it over other charts is that it gives the reader all the information you need to choose the correct needle: types, uses, sizes available, and (unlike other charts I’ve seen) the types of threads or the numbers of strands to use with the different sizes of needles.
Once you decide what needles you’d like to have on hand (the ideal is to have access to several different types and sizes in your sewing basket), check out Colonial Needle, which is a great place in the US to buy a wide variety of fine needles.