Choize Silicone Id Card/ Credit Card Holder Back Adhesive Sticker for Iphone 5 4 4s for Samsung S3 S4 S5 (Yellow) Silicone ID Card/ Credit Card Holder Back Adhesive Sticker. Made of silicone material, with back adhesive sticker to stick it to the smooth back of your phone. Easy to use: peel off the cover of the sticker and stick to your phone back, and finish by softly pressing. Strong adhesive sticker, no worry of falling off easily. Fits standard size business cards, ID cards and credit cards.