Silk collar lining

Silk half-collar (eri)
Dark navy is plain.
Others have cute small floral patterns.
Set of 4.

These are unused and new, but have been stored at home for a long time, so I have listed them as near unused.
I state they are pure silk, but there is no way to prove it.
I have been working as a kimono tailor for 50 years and as a kimono dressing instructor for over 10 years, and I am still active in my profession.
I have judged them to be silk with my own eyes, so please understand.

Thank you for looking.