Needle Sizes:
The needle gauge is indicated by a number and the bigger the number, the finer and shorter the needle. For each type of needle, the length of the needle and the size of the eye are adapted to the needle’s shaft diameter or gauge.
Darners are longer then sharps and range in size from 5/0 to 9. The 5/0 size are much larger and have a big eye for darning with thicker threads or wool. They are used for mending with yarn or cotton and are also suitable for tacking as they are very long.