I would like to know if someone could explain what a topstitch needle is, what it is used for and about the different sizes.

Thanks, Mary Sheehan

A top-stitch needle should be a sharp needle, not an universal point.
You would select the size according to the weight of your fabric.
If you are going to use 2 strands of thread for your top-stitching, than you should have a sharp with a larger eye. For instance, you could use a needle designed for using metallic threads because it would be sharp and have a larger eye.
Joyce

Here is a site that has some...I think surgers use them a lot

http://www.shiboridragon.com/Notions.htm

Wow, Joyce thanks, that is good info.

Ruthie thanks, great website. Now I know all about needles.

Ruthie--I spent an hour looking at that fabric and the stencils...Wow! They're beautiful. Thanks for sharing :D