Mini fits sizes US 000 (1.75 mm) to US 1.5 (2.5 mm) needle tipsSmall fits sizes US 2 (2.75 mm) to US 8 (5 mm) needle tipsLarge fits sizes US 9 (5.5 mm) to US 15 (10 mm) needle tips?Tic tac? sized pieces allow you to join two or more cables together to make a longer cord. **Mini connectors only work with the Mini cables and tips.**