Please note! This card falls below the dimensional requirements set by the US Postal Service and CANNOT be mailed. <br/><br/> With unique designs printed on luxe paper, these Valentines are the perfect way for your kids to celebrate with their classmates! Classroom Valentines come with white envelopes. If you have any questions, please <a href="/feedback?subject=I have a question about Classroom Valentine's Day Cards">email us</a>.<br>This design features a fun secret message for your friends and classmates to decode. Code says: "Thanks for being a great friend"