This is a playpen for Djungarian hamsters. The shape can be freely changed to fit the space. Compact size for space-saving storage! 'Size (when circular)' Approximately 55cm in diameter x 23cm in height I bought this but hardly used it, so there are some minor scratches. Please refrain from purchasing if you are concerned about this. The product is shown in the third image, but the box has been discarded and is not included.