Pen for scale. The University of Colorado at Boulder CU Boulder Buffaloes sticker decal is an officially licensed product perfect for football fans of the Colorado Buffaloes. Made specifically for the regular season, this unisex adult decal is ideal for showing support for the team during NCAA events and tournaments. Represent your favorite sports team with this high-quality sticker decal that is a must-have for any fan of the University of Colorado at Boulder.