Toss in the wash with cold water. Air dry. Boom.
Definitely big.
"I’m only removing one star because they are slippery and loose on my foot. I wear a 6 universal and these definitely fit larger. I prob could’ve done a 5 but didn’t want the hassle of returning and getting different ones. If I purchase another pair or color I’ll size down! Other than that I do really like and have gotten a lot of compliments! I’m usually a birk girl but had to see what the hype was about Rothy’s and the comfort is I think where it’s at!"