Standard (commercial) license for digital assets:
By purchasing these assets, you gain the right to use them in both your free and commercial projects - the license has no time limit; they're yours for as long as you need them! However, you may not re-sell or re-package or re-distribute or sub-license the assets to others, regardless of how much you modify or change them! Apart from that, they're yours to do with as you wish within the scope of your project(s).