sewing needles and finger
sewing needled are classified by their and thickness.
the usual types are standard and long .
the numbering system is not directly related to the length or thickness of the needle.
it serves only to distinguish one needle from another.
the length and thickness of a needle will be chosen according to the fabric to be sewn, the thread to be used and the sewing technique.
sewing needles are made of nickel-plated steel.
they have to be flexible, smooth and sharp.