Measures 2 5/8 inches Long (66mm) These WILL NOT Fit All Swarovski Pens, They Utilize Many Different Style Refills In Their Pens Each Set Comes With 1 Re-usable plastic Threaded Cap. Some Pens Do Not Need This, Please See The Pictures As Some Pens Us An Adapter 30 Day Satisfaction Guarantee, No Hassle Returns If Not Satisfied Refills Are Compatible With SOME Swarovski Crystalline Pens, Cross 8518-4, Lamy M21 and more - 15 Pieces Per Order - Bulk Packed These refills are Compatible With SOME, NOT ALL, Swarovski Crystalline Pens, Cross 8518-4, Lamy M21 and most Multi-Function pens. Please compare the size to your current refill. Brand names mentioned are registered trademarks of their respected companies and names are only used for compatibility reasons