RFID Blocking Wallet. Blocking will be effective for contactless new Credit/Debit Cards as well as HID i Class newer cards. Older access cards with 125 KHz frequency will not be effected. Measures: 4" x 3 1/4" x 1/8" - 6 Card Slots 1 Larger Card/Money/Receipt Pocket - Top Center Access Ultra Slim Professional Business Card Case or Wallet. Compact Design for Front or Back Pocket Wear For cash & 1. Credit/debit card 2. ID card 3. Driver license