This is a glow-in-the-dark rubber keychain from MOONEYES. It glows quite brightly. Size (excluding the key ring): 5cm (H) x 5.5cm (W) Total length including key ring: 9.7cm If you purchase multiple items and would like combined shipping, we can offer a discount on the shipping cost. Please contact us before making your purchase. Since we ship via Mercari, we cannot change the price after purchase. Thank you for your understanding.