The InmateAid photos are printed on 4x6 high gloss photo paper - approved for all jails and prisons. These are NOT a printed postcard, they are delivered safely in an envelope directly into the facility. Make sure that you have the inmate's ID (if applicable) and allow 1-3 business days for delivery.
https://www.inmateaid.com/ask-the-inmate/i-am-having-trouble-finding-out-how-to-deliver-photos-to-my-inmate-do-i-mail-them-like-a-postcard#answer
Accepted Answer Date Created: November 19,2013