Since all eBay sellers are now required to use eBay's managed payments, the selling fee for the Clothing, Shoes & Accessories categories is about 12.55% plus $0.30 per order if the item is under $100.00. There are different fee schedules for different categories though.
You can find out more here: https://www.ebay.com/help/selling/fees-credits-invoices/selling-fees?id=4822#section2