I love the design and quality of the key covers but, as people have said in other reviews, they are extremely big. I bought them knowing I could only use them with my largest key but even then, they are impractical to have on keychain with several other keys. Also Essek's feet get in the way of putting the entire key in the keyhole, making it unusable (this is not an issue with the beacon). This would do best as a cover for spare or guest keys that are standalone and you want to stick out. I would recommend making copies of the keys you wish to use with a large "headed" key to fill up the key cover if you want the best results. It would really be in their best interests to redesign this product to make it more functional, especially since this is such a beloved character.