My mother was in need of tennis balls for the back legs of her walker. She being 70 years old, and 1800 miles from me I was worried that she would injure herself trying to cut into the regular tennis balls that she was planning on buying, and she was not happy with the neon yellow that they normally come in. I saw these, and would have gladly paid double or triple the price they are asking just to assure that Mother would not get injured. They were delivered very quickly, and they slipped right over the legs of the walker. The cut is just perfect, larger enough but not too large. And the silver matches the walker much better than the neon colors that tennis balls usually come in. Everywhere she goes she has many people stopping her and asking her where her fabulous balls came from. It is a conversation starter and has lead to her meeting and talking to a lot of very kind strangers along her way.