Sizing chart said heal-to-toe measurement for a size 15 was 12.25" Even though I usually wear a 13 or 14, I ordered 15 because I needed 12.25"! When they arrived, size 15 is actually 13.25".  Now, for a $20 pair of shower slides, I have to pay $12 to return them.  From now on, Zappos will get ALL of my footwear business.  What a rip-off, when the sizing chart is wrong.  Very disappointed.

UPDATE: After writing Under Armour an email via Amazon, they agreed quickly to pay for the return shipping.  I thank them !