Connect with people and show you care with postcards. Budget-friendly postcards are staples for Sunday school teachers and a great way for anyone to stay in touch. A photo with a monarch butterfly resting on a flowershares the sentiment: We miss you! Scripture on the back: A friend loveth at all times. Proverbs 17:17. Standard 3.5' x 5.5' postcards come in shrink-wrapped packages of 25.