Neptune Giftware Ladies Genuine Super Soft Leather Passport Holder Cover 100% Leather Neptune Giftware Ladies Genuine Super Soft Leather Passport Holder Cover. A beautiful passport holder made of top quality soft leather. The passport cover is held securely closed with a pop stud keeping your passport safe and secure inside. The leather passport holder measures approximately 10 x 15 cm when closed. There is also a small section on the back of the holder.