This is my collection. I purchased them 30 years ago from an antique shop. I was told they are Japanese pottery made for overseas export around the Showa 30s (1955-1964), and were then imported back into Japan. They have brought me much joy, so I hope someone who will cherish them will take these four figures on their next journey. There are no cracks or chips. They are all hand-painted. They are surprisingly lightweight. They have a matte (restrained) finish. The height varies slightly, but they are approximately 7.5 to 8.2 centimeters tall. They are undeniably adorable, looking as though the mice are plotting their next adventure in a new town, no matter how you look at them.