An interesting surprise for you, a free version of String Tie Paper Envelope Mockup. It has a beautiful design and is a well-made mockup. It has a realistic design that can easily change depending on our needs. You can put your brand on the letter to make it look like we glued it or write some text. Thanks to smart layers, we do easily everything. They put the blue background as an example. You can put another one and it will look depending on the idea you have. The strings are unique. Download String Tie Paper Envelope Mockup for free.
You can check also this free float envelope mockup.