The Samsung Galaxy S6 + Edge requires a nano sim card.
This Sim card format is currently the smallest format, which is used on the market in smartphones. Many users who are now switch to the Samsung Galaxy S6 Edge +, have very probably a micro or standard Sim card. If so, then you can punch a Nano Sim Card thereof, as follows:
With a Sim card punch it is very easy to punch a nano sim card from a larger format. Here you will find: Sim card punch