Tech Swiss TSMET135 Watch Band Expansion Stretch Metal Silver Color Thin Line 18-20mm Watch Band Expansion Metal Stretch Silver-tone Plated to Fit Case with Straight Ends Replacement Strap Fits Most Cases with Curved Case Openings 176mm up to 21mm Watch Band Length: 6" without Stretch Band Thickness: 2.5mm Band Offers Links with Polish Silver-Tone Finish- Band Can Be Adjusted xpansion Watch Band can Update a Watch or Replace a Broken Band without Spending alot of Money