This is a hedgehog-patterned mug. I think it's a bit small for a mug. I've used it about a dozen times, but I haven't noticed any significant changes. Diameter: 8.2cm Height: 6.6cm Width (including handle): 10.4cm The following is a quote: Masae Koda creates works with gentle and soft colors that make you feel happy just by looking at them. They're incredibly cute! The size and usability are excellent, and they're all items that fit into everyday life, making it hard to choose just one. Your children will be delighted and will likely learn the names of the animals. They're cute even for adults, so it's recommended to get enough for everyone to avoid any squabbles.