MyExpression.com 20 Inflatable Bounce House Kids Fill-in Girl Birthday Thank You Cards Paper Weight: 100 lb. Premium Quality Heavy Weight Uncoated Card Stock. Paper Finish: Uncoated Smooth for easy to write. Card Size: 4.25 x 5.5 with top quality full color double-sided digital printing. Sold in pack of 20 fill-in cards and 20 white envelopes. Fixed price shipping for any quantity.