Rfid Blocking Shield Guard Cards for Full Wallet Security, 2 Pack of Rfid Blocking Credit Card Size Cards Shield Card Cards Are The Same Size As A Credit Card But Thinner So They Can Easily Slide Behind The Cards That Are Currently In the Wallet. Simply Put One Shield Guard Card On Each Side Of Wallet To Sandwich Card This Design And Artwork Will Keep Your Wallet Safe And Looking Good Cards Fit Easily Behind Cards One May Already Have In Wallet Blocks Against NFC and RFID Readers and Skimmers