need to know needle size and entire length from one needle tip to the other for each circular set. If the needles don't have size printed on them anywhere - you need to have a gadget to "size"them...would like these if I don't already have these sizes.
there is a knitting gadget if you will, that will measure the size of the needle width / thickness but unless your a knitter it's not something you'd have handy. If you know any knitters they might be able to help you.