Equivalent wool

Hi all. I have an old pattern by lister lee and it is for kaftan wool. Does anyone know the equivalent for this as I would love to knit the jumper. Thank you…

Welcome to the forum!
Ravelry lists it as an aran weight which would be about 16-18sts/4 inches.
You can search your favorite online store or ask at your local store. Here are some ideas from WEBS.
https://www.yarn.com/search?utf8=✓&q=aran+weight+yarn&button=search

Thank you…so quick too. Will check it out…again thank you