I purchased this from the dinos online shopping site about 4-5 years ago. I've worn it 1-2 times. The opening is made of rubber, so it fits your feet easily. The heel is about 5 cm, so I think you can wear it for work, etc. I'm selling it because I don't have a chance to wear it. There is no box. This is a used item. Please refrain from purchasing if you are sensitive to used items.