Long letters work 

How often have you heard (or said):  Nobody reads long letters these days. 

Wrong assumption.  Long letters are read IF what you are selling requires a bit of description, and if your letter is well-written, includes compelling subheads that pull the reader through your message all the way to your closing call to action, and perhaps includes visual elements. 

Short letters work fine when you have enclosures that include the benefits of your product or service in text and visuals…and perhaps a coupon or business reply card (BRC) enclosure.   

Short letters work fine when your objective is to convince the recipient to accept a follow up call for an appointment or further personal discussion of your service.  Usually these types of letters open right up with an emotional “pain” statement followed by potential “medicine” to cure the pain. 

Crafting sales and customer service letters that get the results you want is a special skill---part science, part art.  With some bias and ego, may we suggest is an assignment for professional writers who have been there, done that, with success.