thank you cards for kids - 20 cards with envelopes gsm brands gsm paperie by gsm brands kids thank you cards are the perfect way for your kids to send a heartfelt note of gratitude to your family and friends. fun party polka dots with fill in the blanks on the front and a 5" x 7" polka dots pattern on the back. with an easy to write on surface and heavy duty card stock construction these thank you cards will sure to hold up through the rough and tough journey to your family and friends mailbox.