What wonderful ideas for sunshade with patterns !!
Here’s a few tips:Chose the pattern that have a number of sides that matche the number of prongs on your umbrella. If your umbrella has more or less, you have to use a doily or pattern that has the matching number of sides. Choose a pattern that has a minimum of 16 or higher Double Crochets around the centre ring so you can wrap comfortably around the tip of the umbrella. You will use a Magic Circle instead so you can pull it tight around the tip of the umbrella when you are ready to mount. When you increase a crochet hook and thickness of yarn, you automatically will increase the size of the doily. This automatically increase the size of the project. The pattern shoud comfortably sit over the prongs and somewhat hide them.