Glass headed pins have a head made of glass that does not melt under the iron. Plastic headed pins can not be ironed, they melt and leave stains on the fabric. That is why we only sell glass headed pins

These pins are from the Clover brand and have a fine point that penetrates fabric well. Use these superfine pins of 0,4x36mm for fine delicate fabrics. Because of the  0,4mm thickness they are also very flexible. Would you like your pins a little firmer and still thinner than the standard? Try the 0,5mm thick.

To compare: standard pins are usually 0,6mm thick