Hi Elsie,
I think you have a good number of items to have the shop looking full :) However, as Mirry mentioned, you have to have shop policies - especially if you don't have any reviews yet. I personally won't buy from shops that don't because I would want to know whether there's any protection for me, as a consumer, should the item get lost, be broken, etc.
I think you will also need some photos of each wreath that are a bit more zoomed out so you can see the whole wreath in the thumbnail picture, as opposed to just a section of it. It'll give you some blank space around each wreath, and let the eyes rest a bit since the wreaths are so colourful! This way, it'll help the buyer distinguish one listing from another a bit better.
Good luck :)