You can use this Free Envelope Mockup to present your Envelope design in your portfolio or to your clients in a clean and simple way. You just need to put your design in the smart layer and it is done. You can modify the background colour according to your requirements. You need to have photoshop to edit it.
File Format: PSD
Dimensions: 3200×1600 px
Size: 64 Mb
License: Free for personal & commercial use