Thomas & Friends Full Steam Ahead Thank You Note Cards. A great way to say THANK YOU and show your appreciation to your little Thomas lovers birthday party guests. These postcard-style thank you notes feature Thomas the Tank Engine with a "No 1" symbol at the top and a large red "Thanks!" headline at the bottom. You can seal the envelopes with stickers featuring steam train number one. Package contains: 8 postcard thank you notes, 4 1/4in wide x 6 1/4in tall, 8 envelopes and 8 sticker seals, 1 1/4in diameter.