Impression Obsession Clear Stamps Happy Hour. This is a clear photopolymer stamp set measuring 4 x 6 inches. These clear stamps are proudly made in the USA from the highest quality photopolymer. The stamp set includes various images, such as two penguins, a pair of mittens, a winter cap, a hot beverage in a mug with the sentiment This is my happy hour on it, snowflakes, the sentiment warm wishes, and a person all bundled up. These stamps are perfect for your crafting projects during the winter season.