A curved needle generally used for sewing pointe shoe — darning of the toe area or for Tutu plate attaching of decoration in hard to sew areas.
Anywhere that is difficult for the needle to go straight through your item being sewn.
Be aware they are not fine like beading needles.
Commonly used to sew mattresses.
These are 19 gauge thick and 3″ in length following the curve. Measuring straight across from end to end is 45mm approximately