But, if you are buying tubing, 1/4 is cheaper & will do the job.
[Generally, you need liquid nitrogen to chill a wart enough to be effective.]
Remember one unassailable statistic, as explained by the late, great George Carlin: "Just think of how stupid the average person is, and then realize half of them are even stupider!"
"I would like to die on Mars, just not on impact." Elon Musk