Why are the windowless letters more expensive than the windowed letters?

It comes down to the little touches that make a big difference. A windowless envelope on Thanks.io is designed to feel more personal and authentic like real mail from a real human.

Here’s what sets it apart:

• Handwritten-style address: Instead of showing through a plastic window, the recipient’s name and address are printed directly on the envelope in a handwritten-like font. It looks more intimate and engaging.  It's written in blue ink which is known to be more calming and more individuals are inclined to open it.

• Real postage stamp: These envelopes use an actual stamp (not metered postage), which adds a classic, personal feel and boosts open rates.

It’s a small upgrade that makes a big impression and yes, it costs just a little more to make that magic happen.