One 6.25 x 6 inch Happy Grumpy Birthday Small Centerpiece with assembly instructions. Add some saggy style to your tables with our Happy Grumpy Birthday Small Centerpiece. This centerpiece was designed by Moxzie, Inc. to coordinate with our Happy Grumpy Birthday Party Supplies. The triangular piece is printed on all three sides, and set-up is quick and easy. Use your centerpiece alone, or pair it with our tall centerpieces for a perfect matching set.