Have you ever made a pattern yarn substitution and it didn’t turn out quite right? Either the size was off or the finished project didn’t look the same. Can I get a yes?! I had to learn the hard way that you can’t use whatever yarn you want with the same hook or needle size and have it turn out the same. That’s not to say yarn substitution isn’t possible, however! You can avoid the frustration that comes from finishing a project you’re not happy with if you do a little prep work first. That’s what you’ll learn about in