These mini note cards would be great to send a thank you message with your Etsy orders.
At Weddings by Susan on Etsy, you can order 12 mini thank you cards each measuring 3 inches by 3 inches for $4 per set. My newest designs feature either a peacock or a sweet birds in nest scene.
Other designs also available.
Peacock 3x3 Mini Thank You Notes
3x3 Mini Thank You Notes Birds in Nest