8 piece teacher stamp set includes phrases： Excellent! Very Good! Parent Signature 100% Great Effort! Great Work! Please Correct And Return Let's Work Together On This One! Each set contains 8 different styles of stamps w/convenient plastic storage tray. Self inking, no need for a separate ink pad. Each Stamp Makes Over 30,000 Impressions Acid & Lignin Free Features Fun Cartoon Designs & Motivating Messages Assorted colors create a fun and visual display that really transforms learning and assessing your students work into a fun experience for both the student and the teacher Perfect for elementary schools and even preschools,home or the classroom Promotes Academic Growth Tray Dimensions: 2.36" Hx1.85" Lx 0.8"W Stamp Dimensions: 7.3" Lx2.75" Hx2.12"W