Clarks Cloudsteppers Silver Flip Flops EUC

My mom ordered these flip flops as she has multiple times before because she loves them, but this time they were like a whole size bigger. She showed me them in comparison with her current size 7 pair, and these are 1/2 an inch to an inch bigger. She tried to wear once but they were just too big, like a size 7.5 or 8. The soles are a little discolored from wearing one time, but they are otherwise in perfect condition.