About Keiren 

Keiren Special Mail Solutions is a leading producer of envelopes.


Keiren offers a wide range of envelopes in various shapes, sizes, and paper grades. We also offer custom envelopes tailored to your specific needs, requirements, or corporate style. This customized and affordable solution is also available for smaller orders.

From window envelopes, gusset envelopes, and board-backed envelopes to cardboard envelopes, tear-proof security envelopes and sample bags, we offer a suitable solution for everything you could which to post: direct mail, direct marketing, or product shipments). Our practical examples speak for themselves.