USPS 2021 Message Monsters Forever Stamps – Playful Customizable Critter -Sheets 100 pcs

The U.S. Postal Service introduces Message Monsters stamps—the most playful customizable postage yet! These 2021 Forever Stamps feature 20 cute-and-crazy critters across four designs, inviting you to add humor and creativity to every envelope.

Each pane includes adhesive accessories to personalize your monsters: add hats, glasses, or silly props to make them uniquely yours. Designed by Elise Gravel, the whimsical illustrations burst with energy—meet a rosy-cheeked rascal, a four-armed striped imp, a squid-like yellow creature, and a short-shorts-wearing rapscallion.

Perfect for kids’ letters, party invites, or playful notes, these stamps blend fun with functionality. Their forever value locks in current postage rates ($0.66/ounce in 2025), while the interactive design sparks joy for all ages. Let your imagination run wild with the most participatory stamps ever!