You're in luck!! I have owned
Crocs since they were practically 1st invented and I wear a 9 1/2 too.
I will tell you, I like the ones with the holes so the air can circulate around my feet, but sometimes the others are nice as well.
As far as sizing, Houston, there is a small problem. Here goes.
The regular Crocs (almost all types made until 2005) come in whole "double" sizes. What I mean is like 6-7, 8-9, 10-11, etc. They always recommend in you are a half size to go bigger.
Well, the next size for a 9 1/2 is 10-11...very roomy. I still wear mine and they're fine, but I prefer the whole size 10 better.
There are certain styles that you can buy a whole size 10. The most recent pair I bought is a "loafer" type with a partial leather upper and laces. These fit me the best, but they cost over $70
I recommend them highly, but take a lot of time to decide which size fits your foot best. I even tried all the mens sizes and the women's 10-11 fit me the best. Good luck!