Hi vimays2003,
Apparel is one category, which has a lot to do with impulse buying. Keeping this in mind, make sure you
--Provide good images of your product
--Description includes the kind of material used
--Available size
--Keep reasonable shipping charges
It will be helpful to check out listing of some apparel sellers and learn from them
Two other things which I think is important are competitive pricing and Return gaurantee (in case customer is not happy with the purchase). If your product is commonly available, then you might need to highlight the pricing you are offering, however, if your product is unique / hard to find, then you might want to highlight that aspect.
As suggested by other members, you learn as you start listing and selling. So start listing products. Do keep on visiting us for more help, keep us updated on yoru progress, or to just say a hello 🙂
All the best!
Sapana