Offers a secure grip so you can text with one hand, snap better photos, and watch cat videos hands-free. Functions as a convenient stand so you can watch videos on the fly. Repositionable and sticks to most devices and cases (but may not stick to silicone or waterproof cases). Dimensions: 39.74 mm diameter x 7 mm H and 24.25 mm H expanded. STICKS BEST TO SMOOTH HARD CASES. Will NOT stick to SILICONE, HIGHLY TEXTURED CASES, and many SOFT cases. Disc included for sticking directly to glass-backed phones.