We are not aware of another giant hairpin quite like this example, but the spiral design on the conical finial indicate that it is from the Miao minority originally from southern China but also from the so-called Golden Triangle region of northern Thailand.
A very long silver pin emerges from the interior of the conical finial.
Such a hairpin would have been worn for festival occasions only. It is too large and impractical for everyday wear.
The hairpin is in excellent condition and with clear age.
van Cutsem, A., A World of Head Ornaments: Africa, Asia Oceania, America, Skira, 2005.