This is a homemade fabric envelope. It is letter size (6 1/4 x 3 1/2 inches). I use these for budgeting envelopes or for gifting a gift card or money. I wouldn't use these for sending through the mail. The inside has a contrasting fabric and there is a velcro closure. I have used one for close two years and it is holding up well. I will place this envelope into a business envelope and mail through the mail with a first class stamp - there will be no tracking.  Feel free to contact me with any questions!