I would like to design an envelope of size 220×110mm. Please can you suggest me what would be the canvas size for Photoshop file. Appreciate if someone help me to understand the template guideline (Bleed, safe zone, Trim line, etc.). Something like below link.
That envato template use inches. For International Sizes Bleed is 3 mm. (bleed area is what are cut off when the envelope is finished). Trim line is the line for cutting the bleed. Safe zone is the area inside envelope for your graphic elements. Safe zone line is placed at 5 mm inside from trim line. Here some envelope templates. http://www.e-print.my/download_Envelope_Template. Also you can use 5 mm bleed if your envelope have window.