I made the same mistake when I started woodworking and bought the set of 4 instead of 8. I eventually bought the rest of the set of 8 buying them separately. I have no issues with the quality.
Like George W. wrote LeeValley.com makes sizes from 1/8” and 3/16” and up which I added to my collection. They are expensive but I think they’re worth it. They are about $97. Each no freight. I bought these wood carving chisels for a project I was working on and find them great when I need something for detail work.
