Self-Inking Stamp in RED ink Thousands of impressions before re-inking is necessary Impression Area: 5/8"diameter Double sided ink pad to increase the number of impressions made before reinking is necessary. Stop Writing and Start Stamping! Teacher Stamps are a fun and fast way to get messages to students and parents. Our wide variety of Round Teacher Rubber Stamps include practical messages and motivational phrases that can be used every day and are suitable for all ages. Our Round Teacher Rubber Stamps are ideal for rapid, repetitive stamping because the stamp die automatically re-inks itself by rotating into an ink pad.