Buy velcro that is able to stick to surfaces. Use the soft side under the chair legs. Can cut down with scissors. If needed, use a dab of gorilla glue to adhere the felt to the chair feet.

Perhaps something like this.

melgator8, this is what I used on my chairs…5/8th black rubber feet:

Amazon.

Jennifer, I know this post is a few years old, but so curious to know what worked for you. I just ordered the same stools and am really nervous about protecting my wood floors. The legs being so skinny and (rounded?) on the bottom make it look like it’s going to be difficult to find a good solution. Would love to know that something worked!

@the5geos have you found anything that works. I have the Alstair bar stolls from Ballard. I was thinking of having transparent floor protector but so far have not found any that are 10 - 11' runner types.