From the Etsy Site:
"$0.20 Listing fee
Listings are active for four months, or until they sell.
5 % Transaction fee, 3% + $0.25 payment processing fee
When you sell an item, there's a small commission and standard payment processing fee.
15% Offsite Ads Fee*
Etsy pays to advertise your items across the web through Offsite Ads. You only pay a fee when you make a sale from one of those ads. Learn more about advertising fees"