Alpine Swiss Mens RFID Blocking Deluxe Credit Card Case Wallet Leather Secretary Genuine Leather Measurements (empty): 7 1/2" x 4 1/2" x 1/2" This pocket secretary is larger than a check book and is not designed to fit in pants back pockets. Features 2 very long bill sections that measure: 7" (L) x 3 3/4" (H) 23 Credit Card Slots including 1 ID Window Comes in Alpine Swiss Giftbox. RFID PROTECTED: Certified Independent Lab Tests in Met Labs Santa Clara, CA facility. Secure your personal data for credit card RFID Chips operating at 13.56 MHz Frequency while allowing use of 125 KHz Proximity Cards such as ID badges, hotel cards & some transit cards.