Tapestry Needles, Size 24. Sold per pack of 6 needles.
These needles have a large eye, which makes it easy to thread, and a blunt end (so no chance of accidental finger-pricking - bonus!)
The lower the size number, the thicker the needle.
I stock these in sizes 20-24 for designing, sampling and production.
This smaller size is best for stitching on to the clasps as they are thin enough to pass through the holes of the clasps several times.