You can use this Square Mailing Box Mockup to present your Mailing Box Design in your portfolio or to your clients in a clean and modern way. You just need to put your design in the smart layer and it is done. You can modify the background according to your requirements. You need to have photoshop to edit it.
File Format: PSD
Dimensions: 5000×3500 Px
Size: 32 Mb
License: Free for personal & commercial use