Can I get a sample for a letter to intreduse my fashion desiger company

To whom?
Letters of introduction are a thing of the past. About 97% of unsolicited mail is tossed in the garbage.

Questions about them seem to come mostly from India, where business is still more formal in many ways, but most of the world now deals in the internet, and as such, you use KEYWORDS, pictures, prices, and specific data about materials, quality methods, and timelines for production and shipping.