How-much-yarn-to-use-for-a-long-tail-cast-on-1 August 3, 2022 / How much yarn to use for a long tail cast on: Leave a 6 in tail. So Woolly. Gimme your email...And I'll give you free patterns, tricks, tips, exclusive offers & automatic entry to great competitions! Thank you for subscribing. Something went wrong. I agree to have my personal information transfered to MailChimp ( more information ) I will never give away, trade or sell your email address. You can unsubscribe at any time.