Boxes of luxury quality wholesale Large Square (155mm / 6") envelopes. Trade price boxes of 1000 envelopes in classic shades, ideal for small businesses, greetings cards and wedding stationers. These envelopes are available in a range of neutral shades, and are the perfect match for our wholesale large square envelopes. For small businesses we also have wholesale cellophane bags for large square cards, perfect for displaying your work at craft fairs.