First off, I think we need to clarify something.
This buyer-they left negative feedback, but did they open an official item not as described claim with ebay and apply for money back?
I get the impression they did not do this. They seem to be newbies, with a feedback of only 11, so maybe they don't even know that can do that.
If so, then you have dodged a bullet.
Be happy.
Negative feedback is not good at any time really but especially not in the case of a seller who has only sold a handful of things, I know that. It isn't an ideal look. The feedback they have given is very explicit too, it would make me pause (as a buyer) and look at descriptions and photos a second or third time before committing to buy any of your other things as I would be afraid you might be prone to over glowing descriptions.
However, I take it this is not the case and you gave an accurate description. You have to be prepared for the fact that some people on ebay are not reasonable.
I used to sell many moons ago and I have always also been a buyer and my advice would be to only sell second hand clothing or shoes that are in fantastic condition. Advertise them as very good. That way, you won't have buyers disappointed. In fact they will be rapt as items will be just as or even better than expected.
Anything that is fairly worn, or marked or has fraying or loose threads, or in the case of shoes, maybe worn heels or soles, even if it still has some life in it, is no longer ebay material. That is my opinion, anyway. It lays you open to risk. Maybe try Facebook marketplace for those items. The reason I suggest this is that if a buyer decides randomly that the item is worse than they expected (and they can expect an awful lot for very little money sometimes), then if they are experienced with ebay, they just might make a claim and they would be likely to win as ebay usually (not always, but quite often) tends to err on the side of the buyer. In that case, the seller not only refunds every cent but they also pay for return postage of the item.
At the present moment, if your buyer has done nothing else except give you neg feedback, I would leave it. Just ignore it for now. Don't communicate with the buyer by message or anything else. Don't offer any refund, partial or otherwise.
You could do as someone else suggested and contact ebay in an effort to get the feedback removed. If that doesn't work, you could give a factual reply to the feedback but be aware the buyer also has the right of reply if you do that. Whether they realise that though, I don't know.
Sorry that this happened, OP. Ultimately, you can only control what you do, and not what anyone else does, so if you think that all of your business practices are sound, then this is really the buyer's problem and you should just move on. What is that quote from the Queen? "Recollections of events items may vary" 
Personally, I would like to see eBay overhaul their feedback system, it's still very similar to what they had in the 90s and so much has changed since then.
I like the system on that other site where the buyer leaves a star rating and a longer comment. It just seems silly of eBay to have the buyer leave a dot AND a comment AND four different star ratings - especially when the star rating can contradict the dot if they feel like it. That site also allows people to upload a picture of what they received for their feedback, which I think is a good idea, because people are very visual nowadays and it allows other buyers to verify that your items actually are what you say they are.
