The cell phone holder is designed to be compatible with BOGG Bags, and is an ideal accessory. To install, simply press the button through one of the holes and attachment is complete! Have a Pop Socket on your phone? No problem! The size accomodates some extra room for the add on. Printed from a durable and flexible material, they will stand the test of time while helping to protect your sunglasses from damage. Interior Dimensions: 90mm x 15mm x 105mm Tall Approx: 3-1/2" x 5/8" x 4-1/8" Tall