Size：1mm 1.5mm 2mm 2.5mm 3mm 4mm 5mm 6mm 6.5mm 8mm 10mm 12mm 13.5mm 14mm 16mm 18mm 20mm 25mm 30mm 40mm 50mm 60mm 70mm 80mm 100mm. Maintaining the Transparency of the Glass, When Light Passes Through, the Colors Appear More Transparent and May Produce a Soft Refraction Effect.
eBay