https://graphicriver.net/item/envelopes-mockup-bundle/16890728?s_rank=1

Envelopes Mockup Bundle features:

    32 pre made psd;

    Customizable window shape;

    3 layer style included (Foil, Emboss, letterpress);

    3 paper texture included;

    4 Photo filter included;

    5 background images included;

    Editable via smart-object envelope design;

    Changeable background via smart-object (automatic perspective);

    Easy to cut out, all mask included;

    Separated shadows and reflections;

    Fully organizaed layers and folders;

    High resolution: 3500×2450px;

    Photorealistic result;

    Help file.

Bundle Contains:

Square Envelope Mock-up

Envelope C4 Mock-up

Envelope C5 / C6 Mock-up

Envelope DL Mock-up

Video Tutorials:

Envelope DL Mock-up video tutorial

Envelope C5 / C6 Mock-up video tutorial

Envelope C4 Mock-Up video tutorial

Square Envelope Mock-Up video tutorial