Ann Logan

Most designs supposed to be done using two strands of embroidery floss. But the floss is usually sold in six strand packaging.
So before threading your needle, you should separate all the 6 strands.
To do it just cut somewhat about 15”-18” (35 - 45 cm) of the thread. Hold it near the top with one hand allowing the bottom to untwist. Now pull each ply upward with the other hand. Carefully - one at a time.
Combine the necessary number of strands (typically two) and save the remaining for the next usage.

Embroidery needles used for cross-stitch are often called cross stitch needles or tapestry needles.
Cross stitch needles come in different sizes depending on thickness. Most commonly used size is 24. It is the best choice for stitching on 14-count aida.
A tapestry needle is a hand sewing needle with a blunt end and a large eye.
You don't need a sharp needle to use with an open weave like Aida.
The rounded tip of a tapestry needle is important because it helps to ensure you don't accidentally pierce the threads of the fabric.